# Currency

Currency
You are encouraged to solve this task according to the task description, using any language you may know.

Show how to represent currency in a simple example, using a data type that represent exact values of dollars and cents.

Note

The IEEE 754 binary floating point representations of numbers like   2.86   and   .0765   are not exact.

For this example, data will be two items with prices in dollars and cents, a quantity for each, and a tax rate.

Use the values:

• 4000000000000000 hamburgers at \$5.50 each
• 2 milkshakes at \$2.86 each, and
• a tax rate of 7.65%.

(That number of hamburgers is a 4 with 15 zeros after it.   The number is contrived to exclude naïve task solutions using 64 bit floating point types.)

Compute and output (show results on this page):

• the total price before tax
• the tax
• the total with tax

The tax value must be computed by rounding to the nearest whole cent and this exact value must be added to the total price before tax.

The output must show dollars and cents with a decimal point.

The three results displayed should be:

• 22000000000000005.72
• 1683000000000000.44
• 23683000000000006.16

Dollar signs and thousands separators are optional.

## ALGOL 68

Works with: ALGOL 68G version Any - tested with release 2.8.3.win32
`BEGIN    # currency calculations                                              #    # simple fixed point type, LONG INT is 64-bit in Algol 68G           #    MODE FIXED    = STRUCT( LONG INT value                          , INT      decimals                          , INT      fraction modulus                          );    # make CURRENCY a synonym for FIXED                                  #    MODE CURRENCY = FIXED;    # dyadic operator so we can write e.g. 5 DOLLARS 50 to construct     #    # a CURRENCY value with 2 decimal places                             #    PRIO DOLLARS = 9;    OP DOLLARS = ( LONG INT v, INT dp )CURRENCY: ( ( v * 100 ) + dp, 2, 100 );    OP DOLLARS = (      INT v, INT dp )CURRENCY: LENG v DOLLARS dp;    # issues an error message and stops the program if a has a different #    # number of decimal places to b                                      #     PROC check compatible = ( CURRENCY a, b )VOID:         IF decimals OF a /= decimals OF b THEN print( ( "Incompatible CURRENCY values", newline ) ); stop FI;    # operators to multiply CURRENCY values by integers                  #    OP * = ( CURRENCY v, LONG INT m )CURRENCY: ( value OF v * m, decimals OF v, fraction modulus OF v );    OP * = ( CURRENCY v,      INT m )CURRENCY: v * LENG m;    # returns the CURRENCY value a + b                                   #    OP + = ( CURRENCY a, CURRENCY b )CURRENCY:         BEGIN            check compatible( a, b );            ( value OF a + value OF b, decimals OF a, fraction modulus OF a )          END # + # ;    # multiplies the CURRENCY value a by the FIXED value b,              #    # rounding the result to the decimal places of a                     #    OP * = ( CURRENCY a, FIXED b )CURRENCY:         BEGIN            LONG INT result := ( value OF a * value OF b );            IF decimals OF b > 0 THEN                INT d                = fraction modulus OF b;                LONG INT abs result := ABS result;                INT extra places     = SHORTEN ( abs result MOD d );                abs result OVERAB d;                IF extra places >= d OVER 2 THEN abs result +:= 1 FI;                IF result < 0 THEN result := - abs result ELSE result := abs result FI            FI;            ( result, decimals OF a, fraction modulus OF a )         END # * # ;    # converts a FIXED value to a STRING with the appropriate number of  #    # decimal places                                                     #    OP TOSTRING = ( FIXED v )STRING:         IF decimals OF v < 1 THEN            whole( value OF v, 0 )         ELSE            INT    d       = fraction modulus OF v;            STRING result := whole( value OF v OVER d, 0 );            STRING dp     := whole( ( ABS value OF v ) MOD d, - decimals OF v );            FOR i FROM LWB dp TO UPB dp DO IF dp[ i ] = " " THEN dp[ i ] := "0" FI OD;            result + "." + dp         FI # TOSTRING # ;    # Task calculations                                                   #    CURRENCY hb    = 5 DOLLARS 50 * LONG 4000000000000000;    CURRENCY ms    = 2 DOLLARS 86 * 2;    FIXED    rate  = ( 765, 4, 10 000 ); # 0.0765                         #    CURRENCY net   = hb + ms;    CURRENCY tax   = net * rate;    CURRENCY total = net + tax;    print( ( "before tax: ", TOSTRING net,   newline ) );    print( ( "tax:        ", TOSTRING tax,   newline ) );    print( ( "total:      ", TOSTRING total, newline ) )END`
Output:
```before tax: 22000000000000005.72
tax:        1683000000000000.44
total:      23683000000000006.16
```

## AWK

### version 1

` # syntax: GAWK -M -f CURRENCY.AWK# using GNU Awk 4.1.1, API: 1.1 (GNU MPFR 3.1.2, GNU MP 5.1.2)BEGIN {    PREC = 100    hamburger_p = 5.50    hamburger_q = 4000000000000000    hamburger_v = hamburger_p * hamburger_q    milkshake_p = 2.86    milkshake_q = 2    milkshake_v = milkshake_p * milkshake_q    subtotal = hamburger_v + milkshake_v    tax = subtotal * .0765    printf("%-9s %8s %18s %22s\n","item","price","quantity","value")    printf("hamburger %8.2f %18d %22.2f\n",hamburger_p,hamburger_q,hamburger_v)    printf("milkshake %8.2f %18d %22.2f\n\n",milkshake_p,milkshake_q,milkshake_v)    printf("%37s %22.2f\n","subtotal",subtotal)    printf("%37s %22.2f\n","tax",tax)    printf("%37s %22.2f\n","total",subtotal+tax)    exit(0)} `

Output:

```item         price           quantity                  value
hamburger     5.50   4000000000000000   22000000000000000.00
milkshake     2.86                  2                   5.72

subtotal   22000000000000005.72
tax    1683000000000000.41
total   23683000000000006.13
```

### version 2

` # syntax: GAWK -M -f CURRENCY2.AWK# using GNU Awk 4.1.1, API: 1.1 (GNU MPFR 3.1.2, GNU MP 5.1.2)# INT is used to define values and do math; results then converted to FLOATBEGIN {    PREC = 100    hamburger_p = 550    hamburger_q = 4000000000000000    hamburger_v = hamburger_p * hamburger_q    milkshake_p = 286    milkshake_q = 2    milkshake_v = milkshake_p * milkshake_q    subtotal = hamburger_v + milkshake_v    tax = subtotal * 765    subtotal /= 100    tax /= 1000000    printf("%-9s %8s %18s %22s\n","item","price","quantity","value")    printf("hamburger %8.2f %18d %22.2f\n",hamburger_p/100,hamburger_q,hamburger_v/100)    printf("milkshake %8.2f %18d %22.2f\n\n",milkshake_p/100,milkshake_q,milkshake_v/100)    printf("%37s %22.2f\n","subtotal",subtotal)    printf("%37s %22.2f\n","tax",tax)    printf("%37s %22.2f\n","total",subtotal+tax)    exit(0)} `

Output:

```item         price           quantity                  value
hamburger     5.50   4000000000000000   22000000000000000.00
milkshake     2.86                  2                   5.72

subtotal   22000000000000005.72
tax    1683000000000000.44
total   23683000000000006.16
```

## C

This implementation uses the GMP library for arbitrary precision arithmetic. The only data type used here is mpf_t, the following text is from the GMP documentation :

```Floating point number or Float for short, is an arbitrary precision mantissa with a limited precision exponent. The C data type for such objects is mpf_t. For example:

mpf_t fp;
```

One remark about the code, notice that for setting all other variables the mpf_set_d function is used:

` 	mpf_set_d(burgerUnitPrice,5.50);	mpf_set_d(milkshakePrice,2 * 2.86);	mpf_set_d(burgerNum,4000000000000000);	mpf_set_d(milkshakeNum,2); `

But when it comes to the tax rate, it's mpf_set_str:

` 	mpf_set_str(tax,"0.0765",10); `

The reason is a weird rounding off error which happens if the mpf_set_d function is used. Documentation and example usages of GMP are very rare on the net possibly because it is used almost exclusively by academia and high tech industries. The implementation below is the result of a lot of fiddling, gotchas and lessons learnt, just how good programming should always be :)

Library: GMP
`  #include<stdio.h>#include<gmp.h> int main(){	mpf_t burgerUnitPrice, milkshakePrice, burgerTotalPrice, totalPrice, tax, burgerNum, milkshakeNum; 	mpf_inits(burgerUnitPrice, milkshakePrice, burgerTotalPrice, totalPrice, tax,burgerNum, milkshakeNum,NULL); 	mpf_set_d(burgerUnitPrice,5.50);	mpf_set_d(milkshakePrice,2 * 2.86);	mpf_set_d(burgerNum,4000000000000000);	mpf_set_d(milkshakeNum,2); 	mpf_mul(burgerTotalPrice,burgerNum,burgerUnitPrice);	mpf_add(totalPrice,burgerTotalPrice,milkshakePrice); 	mpf_set_str(tax,"0.0765",10);	mpf_mul(tax,totalPrice,tax); 	gmp_printf("\nTotal price before tax : \$ %.*Ff", 2, totalPrice);	gmp_printf("\nTotal tax : \$ %.*Ff", 2, tax); 	mpf_add(totalPrice,totalPrice,tax); 	gmp_printf("\nTotal price after tax : \$ %.*Ff", 2, totalPrice); 	return 0;} `

Output:

```Total price before tax : \$ 22000000000000005.72
Total tax : \$ 1683000000000000.44
Total price after tax : \$ 23683000000000006.16
```

## C#

The built in C# type decimal has a max value of 79228162514264337593543950335.

`using System;using System.Collections.Generic; namespace Currency{    class Program    {        static void Main(string[] args)        {            MenuItem hamburger = new MenuItem() { Name = "Hamburger", Price = 5.5M };            MenuItem milkshake = new MenuItem() { Name = "Milkshake", Price = 2.86M };             IList<CartItem> cart = new List<CartItem>();            cart.Add(new CartItem() { item = hamburger, quantity = 4000000000000000 });            cart.Add(new CartItem() { item = milkshake, quantity = 2 });             decimal total = CalculateTotal(cart);             Console.WriteLine(string.Format("Total before tax: {0:C}", total));             // Add Tax            decimal tax = total * 0.0765M;             Console.WriteLine(string.Format("Tax: {0:C}", tax));             total += tax;             Console.WriteLine(string.Format("Total with tax: {0:C}", total));        }         private static decimal CalculateTotal(IList<CartItem> cart)        {            decimal total = 0M;             foreach (CartItem item in cart)            {                total += item.quantity * item.item.Price;            }             return total;        }         private struct MenuItem        {            public string Name { get; set; }            public decimal Price { get; set; }        }         private struct CartItem        {            public MenuItem item { get; set; }            public decimal quantity { get; set; }        }    }}`
Output:
```Total before tax: \$22,000,000,000,000,005.72
Tax: \$1,683,000,000,000,000.44
Total with tax: \$23,683,000,000,000,006.16```

## Clojure

`(require '[clojurewerkz.money.amounts    :as ma])(require '[clojurewerkz.money.currencies :as mc])(require '[clojurewerkz.money.format     :as mf]) (let [burgers (ma/multiply (ma/amount-of mc/USD 5.50) 4000000000000000)       milkshakes (ma/multiply (ma/amount-of mc/USD 2.86) 2)      pre-tax (ma/plus burgers milkshakes)      tax (ma/multiply pre-tax 0.0765 :up)]  (println "Total before tax: " (mf/format pre-tax))  (println "             Tax: " (mf/format tax))  (println "  Total with tax: " (mf/format (ma/plus pre-tax tax))))`
Output:
```Total before tax:  \$22,000,000,000,000,005.72
Tax:  \$1,683,000,000,000,000.44
Total with tax:  \$23,683,000,000,000,006.16```

## COBOL

COBOL supports up to 31 digits of decimal precision, so won't need any fancy currency/BigInteger types!

During calculations the default ROUNDED MODE IS clause, when specified, is NEAREST-AWAY-FROM-ZERO. When ROUNDED is not specified, the default mode is TRUNCATION. The term "banker's rounding" implies NEAREST-EVEN.

Works with: GNU Cobol version 2.1
`       >>SOURCE FREEIDENTIFICATION DIVISION.PROGRAM-ID. currency-example. DATA DIVISION.WORKING-STORAGE SECTION.01  Burger-Price                        CONSTANT 5.50.01  Milkshake-Price                     CONSTANT 2.86.01  num-burgers                         PIC 9(18) VALUE 4000000000000000.01  num-milkshakes                      PIC 9(18) VALUE 2.01  tax                                 PIC 9(18)V99.01  tax-edited                          PIC \$(17)9.99.01  Tax-Rate                            CONSTANT 7.65.01  total                               PIC 9(18)V99.01  total-edited                        PIC \$(17)9.99. PROCEDURE DIVISION.    COMPUTE total rounded, total-edited rounded =        num-burgers * Burger-Price + num-milkshakes * Milkshake-Price    DISPLAY "Total before tax: " total-edited     COMPUTE tax rounded, tax-edited rounded = total * (Tax-Rate / 100)    DISPLAY "             Tax: " tax-edited     ADD tax TO total GIVING total-edited rounded    DISPLAY "  Total with tax: " total-edited    .END PROGRAM currency-example.`
Output:
```Total before tax: \$22000000000000005.72
Tax:  \$1683000000000000.44
Total with tax: \$23683000000000006.16
```

## Factor

Factor's ratio type can handle arbitrary-precision calculations with rational numbers. The money vocabulary implements convenience words for treating rationals as money. The DECIMAL: parsing word is used to convert the tax rate 0.0765 to a ratio 153/2000. The money. word is used to print the subtotal 22000000000000005+18/25, tax 1683000000000000+21879/50000, and total 23683000000000006+7879/50000 formatted as you would expect.

`USING: combinators.smart io kernel math math.functions money ; 10 15 ^ 4 * 5+50/100 * ! hamburger subtotal2 2+86/100 *           ! milkshake subtotal+                      ! subtotaldup DECIMAL: 0.0765 *  ! tax[ + ] preserving       ! total "Total before tax: " write [ money. ] 2dip"Tax: " write [ money. ] dip"Total with tax: " write money.`
Output:
```Total price before tax: \$22,000,000,000,000,005.72
Tax: \$1,683,000,000,000,000.44
Total with tax: \$23,683,000,000,000,006.16
```

## Go

`package main import (    "fmt"    "log"    "math/big") // DC for dollars and cents.  Value is an integer number of cents.type DC int64 func (dc DC) String() string {    d := dc / 100    if dc < 0 {        dc = -dc    }    return fmt.Sprintf("%d.%02d", d, dc%100)} // Extend returns extended price of a unit price.func (dc DC) Extend(n int) DC {    return dc * DC(n)} var one = big.NewInt(1)var hundred = big.NewRat(100, 1) // ParseDC parses dollars and cents as a string into a DC.func ParseDC(s string) (DC, bool) {    r, ok := new(big.Rat).SetString(s)    if !ok {        return 0, false    }    r.Mul(r, hundred)    if r.Denom().Cmp(one) != 0 {        return 0, false    }    return DC(r.Num().Int64()), true} // TR for tax rate.  Value is an an exact rational.type TR struct {    *big.Rat}func NewTR() TR {    return TR{new(big.Rat)}} // SetString overrides Rat.SetString to return the TR type.func (tr TR) SetString(s string) (TR, bool) {    if _, ok := tr.Rat.SetString(s); !ok {        return TR{}, false    }    return tr, true} var half = big.NewRat(1, 2) // Tax computes a tax amount, rounding to the nearest cent.func (tr TR) Tax(dc DC) DC {    r := big.NewRat(int64(dc), 1)    r.Add(r.Mul(r, tr.Rat), half)    return DC(new(big.Int).Div(r.Num(), r.Denom()).Int64())} func main() {    hamburgerPrice, ok := ParseDC("5.50")    if !ok {        log.Fatal("Invalid hamburger price")    }    milkshakePrice, ok := ParseDC("2.86")    if !ok {        log.Fatal("Invalid milkshake price")    }    taxRate, ok := NewTR().SetString("0.0765")    if !ok {        log.Fatal("Invalid tax rate")    }     totalBeforeTax := hamburgerPrice.Extend(4000000000000000) +        milkshakePrice.Extend(2)    tax := taxRate.Tax(totalBeforeTax)    total := totalBeforeTax + tax     fmt.Printf("Total before tax: %22s\n", totalBeforeTax)    fmt.Printf("             Tax: %22s\n", tax)    fmt.Printf("           Total: %22s\n", total)}`
Output:
```Total before tax:   22000000000000005.72
Tax:    1683000000000000.44
Total:   23683000000000006.16
```

`import Data.Fixedimport Text.Printf type Percent = Centitype Dollars = Centi tax :: Percent -> Dollars -> Dollarstax rate = MkFixed . round . (rate *) printAmount :: String -> Dollars -> IO ()printAmount name = printf "%-10s %20s\n" name . showFixed False main :: IO ()main = do  let subtotal = 4000000000000000 * 5.50 + 2 * 2.86      tx       = tax 7.65 subtotal      total    = subtotal + tx  printAmount "Subtotal" subtotal  printAmount "Tax"      tx  printAmount "Total"    total`
Output:
```\$ ./currency
Subtotal   22000000000000005.72
Tax         1683000000000000.44
Total      23683000000000006.16
```

## J

We use a naive implementation with arbitrary precision (rational) numbers:

`require 'format/printf'fmtD=: 0j2&":     NB. format rational as decimal Items=:   ;:          'Hamburger     Milkshake'Quantities=: x:   4000000000000000      2Prices=:   x:           5.50          2.86Tax_rate=: x:  0.0765Values=: Quantities * PricesSubtotal=: +/ ValuesTax=: Tax_rate * SubtotalTotal=: Subtotal + Tax OutputTemplate=: noun defineItem          Price            Quantity          Value%9s %8s %20d %22s%9s %8s %20d %22s                               -------------------------------                               Subtotal:  %20s                                    Tax:  %20s                                  Total:  %20s) Vals=: (,Items ,. (fmtD&.> Prices) ,. (<"0 Quantities) ,. (fmtD&.> Values)) , fmtD&.> Subtotal,Tax,TotalOutputTemplate printf Vals`
Output:
```Item          Price            Quantity          Value
Hamburger     5.50     4000000000000000   22000000000000000.00
Milkshake     2.86                    2                   5.72
-------------------------------
Subtotal:  22000000000000005.72
Tax:   1683000000000000.44
Total:  23683000000000006.16```

(Note that if you ever get a bill like this in real life, you should question the person who gave it to you. And, possibly consider legal action and/or patronizing a different establishment. This is because (a) you did not order that many hamburgers, and (b) they did not deliver that many hamburgers, and (c) that much hamburger probably does not exist, and ...)

## Java

`import java.math.*;import java.util.*; public class Currency {    final static String taxrate = "7.65";     enum MenuItem {         Hamburger("5.50"), Milkshake("2.86");         private MenuItem(String p) {            price = new BigDecimal(p);        }         public final BigDecimal price;    }     public static void main(String[] args) {        Locale.setDefault(Locale.ENGLISH);         MathContext mc = MathContext.DECIMAL128;         Map<MenuItem, BigDecimal> order = new HashMap<>();        order.put(MenuItem.Hamburger, new BigDecimal("4000000000000000"));        order.put(MenuItem.Milkshake, new BigDecimal("2"));         BigDecimal subtotal = BigDecimal.ZERO;        for (MenuItem it : order.keySet())            subtotal = subtotal.add(it.price.multiply(order.get(it), mc));         BigDecimal tax = new BigDecimal(taxrate, mc);        tax = tax.divide(new BigDecimal("100"), mc);        tax = subtotal.multiply(tax, mc);         System.out.printf("Subtotal: %20.2f%n", subtotal);        System.out.printf("     Tax: %20.2f%n", tax);        System.out.printf("   Total: %20.2f%n", subtotal.add(tax));    }}`
```Subtotal: 22000000000000005.72
Tax:  1683000000000000.44
Total: 23683000000000006.16```

## JavaScript

`const money = require('money-math')                                             let hamburgers = 4000000000000000                                              let hamburgerPrice = 5.50                                                       let shakes = 2                                                                 let shakePrice = 2.86                                                           let tax = 7.65                                                                  let hamburgerTotal = money.mul(hamburgers.toFixed(0), money.floatToAmount(hamburgerPrice))                                                                     let shakeTotal = money.mul(shakes.toFixed(0), money.floatToAmount(shakePrice))  let subTotal = money.add(hamburgerTotal, shakeTotal)                            let taxTotal = money.percent(subTotal, tax)                                     let total = money.add(subTotal, taxTotal)                                       console.log('Hamburger Total:', hamburgerTotal)                                console.log('Shake Total:', shakeTotal)                                        console.log('Sub Total:', subTotal)                                            console.log('Tax:', taxTotal)                                                  console.log('Total:', total)           `

## Julia

Works with: Julia version 0.6
`p  = [big"5.50", big"2.86"]q  = [4000000000000000, 2]tr = big"0.0765" beftax = p' * qtax    = beftax * trafttax = beftax + tax @printf " - tot. before tax: %20.2f \\$\n" beftax@printf " -             tax: %20.2f \\$\n" tax@printf " - tot. after  tax: %20.2f \\$\n" afttax`
Output:
``` - tot. before tax: 22000000000000005.72 \$
-             tax:  1683000000000000.44 \$
- tot. after  tax: 23683000000000006.16 \$```

## Kotlin

`// version 1.1.2 import java.math.BigDecimalimport java.math.MathContext fun main(args: Array<String>) {    val mc = MathContext.DECIMAL128    val nHamburger  = BigDecimal("4000000000000000", mc)    val pHamburger  = BigDecimal("5.50")    val nMilkshakes = BigDecimal("2", mc)    val pMilkshakes = BigDecimal("2.86")    val taxRate     = BigDecimal("0.0765")    val price = nHamburger * pHamburger + nMilkshakes * pMilkshakes    val tax = price * taxRate    val fmt = "%20.2f"    println("Total price before tax : \${fmt.format(price)}")    println("Tax thereon @ 7.65%    : \${fmt.format(tax)}")    println("Total price after tax  : \${fmt.format(price + tax)}")}`
Output:
```Total price before tax : 22000000000000005.72
Tax thereon @ 7.65%    :  1683000000000000.44
Total price after tax  : 23683000000000006.16
```

## M2000 Interpreter

This task written in M2000 Environment running on Wine 3.6, in a Linux Ubuntu Studio. M2000 environment is an ActiveX object, written with VB6, which use many types from COM Variant Type.

` Module Currency_Task {      Locale 1033      Font "Courier New"      Form 80,32      \\Decimal type      [email protected]      \\ Currency type      hamburger_price=5.5#      milkshakes=2#      milkshake_price=2.86#      tax_rate=0.0765#      \\ Using Columns with variable width in console      PrHeadLine("Item","price","quantity", "value")      PrLine("hamburger",hamburger_price,hamburgers,hamburgers*hamburger_price)      PrLine("milkshake", milkshake_price,milkshakes,milkshakes*milkshake_price)      PrResults( "subtotal", hamburgers*hamburger_price+milkshakes*milkshake_price)      PrResults("tax", (hamburgers*hamburger_price+milkshakes*milkshake_price)*tax_rate)      \\ 1 is double by default we can use 1# or [email protected]      PrResults("total", (hamburgers*hamburger_price+milkshakes*milkshake_price)*(tax_rate+1))       \\ Using variables for partial calculations. They get type from expression result      h_p_q=hamburgers*hamburger_price      m_p_q=milkshakes*milkshake_price       \\ Using format\$ to prepare final strings      Print format\$("{0:15}{1:-8}{2:-25}{3:-25}","Item", "price", "quantity", "value")      Print format\$("{0:15}{1:2:-8}{2:0:-25}{3:2:-25}","hamburger",hamburger_price,hamburgers, h_p_q)      Print format\$("{0:15}{1:2:-8}{2:0:-25}{3:2:-25}","milkshake", milkshake_price,milkshakes,m_p_q)      Print format\$("{0:-48}{1:2:-25}","subtotal", h_p_q+m_p_q)      Print format\$("{0:-48}{1:2:-25}","tax", (h_p_q+m_p_q)*tax_rate)      Print format\$("{0:-48}{1:2:-25}","total", (h_p_q+m_p_q)*(tax_rate+1))      \\ Another time to feed Document to export to clipboard      Document Doc\$=format\$("{0:15}{1:-8}{2:-25}{3:-25}","Item", "price", "quantity", "value")+{      }+format\$("{0:15}{1:2:-8}{2:0:-25}{3:2:-25}","hamburger",hamburger_price,hamburgers, h_p_q)+{      }+format\$("{0:15}{1:2:-8}{2:0:-25}{3:2:-25}","milkshake", milkshake_price,milkshakes,m_p_q)+{      }+format\$("{0:-48}{1:2:-25}","subtotal", h_p_q+m_p_q)+{      }+format\$("{0:-48}{1:2:-25}","tax", (h_p_q+m_p_q)*tax_rate)+{      }+format\$("{0:-48}{1:2:-25}","total", (h_p_q+m_p_q)*(tax_rate+1))+{      }      clipboard Doc\$      \\ one line user function definition      \\ x get type from passed value      Def ExpressionType\$(x)=Type\$(X)      \\ Check Expression final type      Print ExpressionType\$(hamburgers)="Decimal"      Print ExpressionType\$(milkshakes)="Currency"      Print ExpressionType\$(h_p_q)="Decimal"      Print ExpressionType\$(m_p_q)="Currency"      Print ExpressionType\$((h_p_q+m_p_q)*tax_rate)="Decimal"      Print ExpressionType\$((h_p_q+m_p_q)*(tax_rate+1))="Decimal"       Sub PrHeadLine(a\$,b\$,c\$,d\$)            Print Part  \$(1,15),a\$,\$(3,8),b\$, \$(3,25),c\$, \$(3,25),d\$            Print      End Sub      Sub PrLine(a\$,b,c,d)            Print Part  \$(1,15),a\$,\$("0.00"),\$(3,8),b, \$("0"),\$(3,25),c,\$("0.00"), \$(3,25),d            Print      End Sub      Sub PrResults(a\$,b)            Print Part  \$(3,48),a\$,\$("0.00"),\$(3,25),b            Print      End Sub}Currency_Task `

Optional with \$ and thousands separator (a smaller version from above)

` Module Currency_Task {      Locale 1033      Font "Courier New"      Form 80,32      [email protected]      hamburger_price=5.5#      milkshakes=2#      milkshake_price=2.86#      tax_rate=0.0765#      PrHeadLine("Item","price","quantity", "value")      PrLine("hamburger",hamburger_price,hamburgers,hamburgers*hamburger_price)      PrLine("milkshake", milkshake_price,milkshakes,milkshakes*milkshake_price)      PrResults( "subtotal", hamburgers*hamburger_price+milkshakes*milkshake_price)      PrResults("tax", (hamburgers*hamburger_price+milkshakes*milkshake_price)*tax_rate)      PrResults("total", (hamburgers*hamburger_price+milkshakes*milkshake_price)*(tax_rate+1))       h_p_q=hamburgers*hamburger_price      m_p_q=milkshakes*milkshake_price      Document Doc\$=format\$("{0:15}{1:-8}{2:-25}{3:-30}","Item", "price", "quantity", "value")+{      }+format\$("{0:15}{1:-8}{2:-25}{3:-30}","hamburger",str\$(hamburger_price,"\$#,##0.00"),str\$(hamburgers, "#,##0"), Str\$(h_p_q,"\$#,##0.00"))+{      }+format\$("{0:15}{1:-8}{2:-25}{3:-30}","milkshake", str\$(milkshake_price,"\$#,##0.00"),Str\$(milkshakes, "#,##0"), Str\$(m_p_q,"\$#,##0.00"))+{      }+format\$("{0:-48}{1:-30}","subtotal", Str\$(h_p_q+m_p_q,"\$#,##0.00"))+{      }+format\$("{0:-48}{1:-30}","tax", Str\$((h_p_q+m_p_q)*tax_rate,"\$#,##0.00"))+{      }+format\$("{0:-48}{1:-30}","total", Str\$((h_p_q+m_p_q)*(tax_rate+1),"\$#,##0.00"))+{      }      clipboard Doc\$        Sub PrHeadLine(a\$,b\$,c\$,d\$)            Print Part  \$(1,15),a\$,\$(3,8),b\$, \$(3,25),c\$, \$(3,30),d\$            Print      End Sub      Sub PrLine(a\$,b,c,d)            Print Part  \$(1,15),a\$,\$("\$#,###.00"),\$(3,8),b, \$("#,##0"),\$(3,25),c,\$("\$#,###.00"), \$(3,30),d            Print      End Sub      Sub PrResults(a\$,b)            Print Part  \$(3,48),a\$,\$("\$#,###.00"),\$(3,30),b            Print      End Sub}Currency_Task `
Output:
```Item              price                 quantity                    value
hamburger          5.50         4000000000000000     22000000000000000.00
milkshake          2.86                        2                     5.72
subtotal     22000000000000005.72
tax      1683000000000000.44
total     23683000000000006.16
From Optional
Item              price                 quantity                         value
hamburger         \$5.50    4,000,000,000,000,000    \$22,000,000,000,000,000.00
milkshake         \$2.86                        2                         \$5.72
subtotal    \$22,000,000,000,000,005.72
tax     \$1,683,000,000,000,000.44
total    \$23,683,000,000,000,006.16

```

## Maple

`  Digits := 50;tax := .0765; burgersquantity := 4000000000000000;burgersprice := 5.50;burgerscost := burgersquantity * burgersprice; milkshakesquantity := 2;milkshakesprice := 2.86;milkshakescost := milkshakesquantity * milkshakesprice; total := burgerscost + milkshakescost;printf("%.2f\n",total); totaltax := total * tax;printf("%.2f\n",totaltax); totalprice := totaltax + total;printf("%.2f\n",totalprice); `
Output:
```22000000000000005.72
1683000000000000.44
23683000000000006.16
```

## Perl

`use Math::Decimal qw(dec_canonise dec_add dec_mul dec_rndiv_and_rem); @check = (    [<Hamburger 5.50 4000000000000000>],    [<Milkshake 2.86                2>]); my \$fmt = "%-10s %8s %18s %22s\n";printf \$fmt, <Item Price Quantity Extension>; my \$subtotal = dec_canonise(0);for \$line (@check) {    (\$item,\$price,\$quant) = @\$line;    \$dp = dec_canonise(\$price); \$dq = dec_canonise(\$quant);    my \$extension = dec_mul(\$dp,\$dq);    \$subtotal = dec_add(\$subtotal, \$extension);    printf \$fmt, \$item, \$price, \$quant, rnd(\$extension);} my \$rate  = dec_canonise(0.0765);my \$tax   = dec_mul(\$subtotal,\$rate);my \$total = dec_add(\$subtotal,\$tax); printf \$fmt, '', '', '',          '-----------------';printf \$fmt, '', '', 'Subtotal ', rnd(\$subtotal);printf \$fmt, '', '', 'Tax ',      rnd(\$tax);printf \$fmt, '', '', 'Total ',    rnd(\$total); sub rnd {    (\$q, \$r) = dec_rndiv_and_rem("FLR", @_[0], 1);    \$q . substr((sprintf "%.2f", \$r), 1, 3);}`
Output:
```Item          Price           Quantity              Extension
Hamburger      5.50   4000000000000000   22000000000000000.00
Milkshake      2.86                  2                   5.72
-----------------
Subtotal    22000000000000005.72
Tax     1683000000000000.44
Total    23683000000000006.16```

## Perl 6

Works with: Rakudo version 2016.01

No need for a special type in Perl 6, since the Rat type is used for normal fractions. (In order to achieve imprecision, you have to explicitly use scientific notation, or use the Num type, or calculate a result that requires a denominator in excess of 2 ** 64. (There's no limit on the numerator.))

`my @check = q:to/END/.lines.map: { [.split(/\s+/)] };    Hamburger   5.50    4000000000000000    Milkshake   2.86    2    END my \$tax-rate = 0.0765; my \$fmt = "%-10s %8s %18s %22s\n"; printf \$fmt, <Item Price Quantity Extension>; my \$subtotal = [+] @check.map: -> [\$item,\$price,\$quant] {    my \$extension = \$price * \$quant;    printf \$fmt, \$item, \$price, \$quant, fix2(\$extension);    \$extension;} printf \$fmt, '', '', '', '-----------------';printf \$fmt, '', '', 'Subtotal ', \$subtotal; my \$tax = (\$subtotal * \$tax-rate).round(0.01);printf \$fmt, '', '', 'Tax ', \$tax; my \$total = \$subtotal + \$tax;printf \$fmt, '', '', 'Total ', \$total; # make up for lack of a Rat fixed-point printf formatsub fix2(\$x) { (\$x + 0.001).subst(/ <?after \.\d\d> .* \$ /, '') }`
Output:
```Item          Price           Quantity              Extension
Hamburger      5.50   4000000000000000   22000000000000000.00
Milkshake      2.86                  2                   5.72
-----------------
Subtotal    22000000000000005.72
Tax     1683000000000000.44
Total    23683000000000006.16```

## Phix

Library: bigatom

Worked on first attempt. Note that I used 5.5 rather than ba_new("5.5") because I knew it was exact already (ditto 2).

`include builtins\bigatom.ebigatom total_price = ba_add(ba_multiply(ba_new("4000000000000000"),5.5),ba_multiply(2,ba_new("2.86"))),        tax = ba_multiply(total_price,ba_new("0.0765")),        total = ba_add(total_price,tax)ba_printf(1,"Total before tax:%21.2B\n",total_price)ba_printf(1,"             Tax:%21.2B\n",tax)ba_printf(1,"           Total:%21.2B\n",total)`
Output:
```Total before tax: 22000000000000005.72
Tax:  1683000000000000.44
Total: 23683000000000006.16
```

## Python

This uses Pythons decimal module, (and some copying of names from the Perl 6 example).

`from decimal import Decimal as Dfrom collections import namedtuple Item = namedtuple('Item', 'price, quant') items = dict( hamburger=Item(D('5.50'), D('4000000000000000')),              milkshake=Item(D('2.86'), D('2')) )tax_rate = D('0.0765') fmt = "%-10s %8s %18s %22s"print(fmt % tuple('Item Price Quantity Extension'.upper().split())) total_before_tax = 0for item, (price, quant) in sorted(items.items()):    ext = price * quant    print(fmt % (item, price, quant, ext))    total_before_tax += extprint(fmt % ('', '', '', '--------------------'))print(fmt % ('', '', 'subtotal', total_before_tax)) tax = (tax_rate * total_before_tax).quantize(D('0.00'))print(fmt % ('', '', 'Tax', tax)) total = total_before_tax + taxprint(fmt % ('', '', '', '--------------------'))print(fmt % ('', '', 'Total', total))`
Output:
```ITEM          PRICE           QUANTITY              EXTENSION
hamburger      5.50   4000000000000000   22000000000000000.00
milkshake      2.86                  2                   5.72
--------------------
subtotal   22000000000000005.72
Tax    1683000000000000.44
--------------------
Total   23683000000000006.16```

## Racket

Racket can handle fractions. To read the decimals numbers as fractions instead of floating point numbers, they must start with #e. For example #e.3 -> 3/10 and .3 ->3E-1. The main problem is rounding correctly and this part is handled in cents-*, that implements a multiplication that rounds to the cents. The rest of the program is only formatting.

`#lang racket(define (cents-* x y)  (/ (round (* 100 x y)) 100)) (struct item (name count price)) (define (string-pad-right len . strs)  (define all (apply string-append strs))  (string-append  all (make-string (- len (string-length all)) #\space))) (define (string-pad-left len . strs)  (define all (apply string-append strs))  (string-append  (make-string (- len (string-length all)) #\space) all)) (define (show-formated name count price total)  (printf "~a ~a ~a -> ~a\n"          (string-pad-right 10 name)          (string-pad-left 18 count)          (string-pad-left 8 price)          (string-pad-left 23 total)          )) (define (show-item it)  (show-formated (item-name it)                 (~r (item-count it))                 (string-append "\$" (~r (item-price it) #:precision '(= 2)))                 (string-append "\$" (~r (cents-* (item-count it) (item-price it)) #:precision '(= 2)))          )) (define (show-total all tax-rate)  (define net (for/sum ([it (in-list all)])                       (cents-* (item-count it) (item-price it))))  (define tax (cents-* net tax-rate))  (show-formated "" "" "net" (string-append "\$" (~r net #:precision '(= 2))))  (show-formated "" "" "tax" (string-append "\$" (~r tax #:precision '(= 2))))  (show-formated "" "" "total" (string-append "\$" (~r (+ net tax) #:precision '(= 2))))  ) (define hamburger (item "hamburger" 4000000000000000 #e5.50))(define milkshake (item "milkshake" 2 #e2.86))(define all (list hamburger milkshake)) (for-each show-item all)(newline)(show-total all (/ #e7.65 100))`
Output:
```hamburger    4000000000000000    \$5.50 ->   \$22000000000000000.00
milkshake                   2    \$2.86 ->                   \$5.72

net ->   \$22000000000000005.72
tax ->    \$1683000000000000.44
total ->   \$23683000000000006.16```

## REXX

REXX uses characters to represent everything, including all forms of numbers.   So what is expressed as a literal (characters) is what REXX uses.   Essentially, it can be thought of as decimal.

Programming note:   the tax rate can be expressed with or without a percent   (%)  suffix.

### without commas

`/*REXX program shows a method of computing the total price and tax  for purchased items.*/numeric digits 200                                        /*support for gihugic numbers.*/taxRate= 7.65                                             /*number is:   nn   or   nn%  */if right(taxRate, 1)\=='%'  then taxRate=taxRate / 100    /*handle plain tax rate number*/taxRate=strip(taxRate, , '%')                             /*strip the  %   (if present).*/item.  =;                          items=0                /*zero out the register.      */item.1 = '4000000000000000  \$5.50  hamburger'             /*the  first  item purchased. */item.2 = '               2  \$2.86  milkshake'             /* "  second    "      "      */say center('quantity',22)       center("item",22)       center('price',22)hdr=center('',        27,"─")   center('',    20,"─")   center('',     27,"─");    say hdrtotal=0         do j=1  while item.j\==''                        /*calculate the total and tax.*/         parse var item.j   quantity price thing          /*ring up an item on register.*/         items    = items + quantity                      /*tally the number of items.  */         price    = translate(price, , '\$')               /*maybe scrub out the \$ symbol*/         subtotal = quantity * price                      /*calculate the     sub-total.*/         total    = total + subtotal                      /*    "      "  running total.*/         say right(quantity, 27)    left(thing, 20)     show\$(subtotal)         end   /*j*/say                                              /*display a blank line for separator.  */say translate(hdr, '═', "─")                     /*display the separator part of the hdr*/tax=format(total * taxRate, , 2)                 /*round the total tax for all the items*/say right(items  "(items)", 35)     right('total=', 12)            show\$(total)say right('tax at'  (taxRate * 100 / 1)"%=", 48)                   show\$(tax)saysay right('grand total=', 48)                                   show\$(total+tax)exit                                             /*stick a fork in it,  we're all done. *//*──────────────────────────────────────────────────────────────────────────────────────*/show\$:  return right('\$'arg(1), 27)              /*right─justify and format a number.   */`
output   (attempting to mimic a check-out register to some degree):
```       quantity                 item                  price
────────────────────── ────────────────────── ──────────────────────
4000000000000000 hamburger               \$22000000000000000.00
2 milkshake                               \$5.72

══════════════════════ ══════════════════════ ══════════════════════
4000000000000002 (items)         total=  \$22000000000000005.72
tax at 7.65%=   \$1683000000000000.44

grand total=  \$23683000000000006.16
```

### with commas

`/*REXX program shows a method of computing the total price and tax  for purchased items.*/numeric digits 200                                        /*support for gihugic numbers.*/taxRate= 7.65                                             /*number is:   nn   or   nn%  */if right(taxRate, 1)\=='%'  then taxRate=taxRate / 100    /*handle plain tax rate number*/taxRate=strip(taxRate, , '%')                             /*strip the  %   (if present).*/item.  =;                          items=0                /*zero out the register.      */item.1 = '4000000000000000  \$5.50  hamburger'             /*the  first  item purchased. */item.2 = '               2  \$2.86  milkshake'             /* "  second    "      "      */say center('quantity',22)       center("item",22)       center('price',22)hdr=center('',        27,"─")   center('',    20,"─")   center('',     27,"─");    say hdrtotal=0         do j=1  while item.j\==''                        /*calculate the total and tax.*/         parse var item.j   quantity price thing          /*ring up an item on register.*/         items    = items + quantity                      /*tally the number of items.  */         price    = translate(price, , '\$')               /*maybe scrub out the \$ symbol*/         subtotal = quantity * price                      /*calculate the     sub-total.*/         total    = total + subtotal                      /*    "      "  running total.*/         say right(quantity, 27)    left(thing, 20)     show\$(subtotal)         end   /*j*/say                                              /*display a blank line for separator.  */say translate(hdr, '═', "─")                     /*display the separator part of the hdr*/tax=format(total*taxRate,,2)                     /*round the total tax for all the items*/say right(commas(items  "(items)"), 35)      right('total=', 12)       show\$(total)say right('tax at'  (taxRate * 100 / 1)"%=", 48)                       show\$(tax)saysay right('grand total=', 48)  show\$(total + tax)exit                                             /*stick a fork in it,  we're all done. *//*──────────────────────────────────────────────────────────────────────────────────────*/commas: procedure;  parse arg _;   n= _'.9';    #=123456789;    b=verify(n, #, "M")        e=verify(n, #'0', , verify(n, #"0.", 'M') )  - 4        /* [↓]  commatize number*/           do j=e  to b  by -3;    _=insert(',', _, j);    end  /*j*/;            return _/*──────────────────────────────────────────────────────────────────────────────────────*/show\$:  return right( commas('\$'arg(1) ), 27)    /*right─justify and format a number.   */`
output   with commas in the larger numbers:
```         quantity                   item                    price
─────────────────────────── ──────────────────── ───────────────────────────
4,000,000,000,000,000 hamburger             \$22,000,000,000,000,000.00
2 milkshake                                  \$5.72

═══════════════════════════ ════════════════════ ═══════════════════════════
4,000,000,000,000,002 (items)       total=  \$22,000,000,000,000,005.72
tax at 7.65%=   \$1,683,000,000,000,000.44

grand total=  \$23,683,000,000,000,006.16
```

## Ring

` # Project  : Currency nhamburger  = "4000000000"phamburger  = "5.50"nmilkshakes = "2"pmilkshakes = "2.86"taxrate = "0.0765"price = nhamburger * phamburger + nmilkshakes * pmilkshakestax = price * taxratesee "total price before tax : " + price + nlsee "tax thereon @ 7.65 : " + tax + nlsee "total price after tax  : " + (price + tax) + nl `

Output:

```total price before tax : 22000000005.72
tax thereon @ 7.65   : 1683000000.44
total price after tax   : 23683000006.16
```

## Scala

Library: Scala
Locale is manipulated to demonstrate the behavior with other currencies.
`import java.text.NumberFormatimport java.util.Locale object SizeMeUp extends App {   val menu: Map[String, (String, Double)] = Map("burg" ->("Hamburger XL", 5.50), "milk" ->("Milkshake", 2.86))  val order = List((4000000000000000L, "burg"), (2L, "milk"))   Locale.setDefault(new Locale("ru", "RU"))   val (currSymbol, tax) = (NumberFormat.getInstance().getCurrency.getSymbol, 0.0765)   def placeOrder(order: List[(Long, String)]) = {    val totals = for ((qty, article) <- order) yield {      val (desc, itemPrize) = menu(article)      val (items, post) = (qty, qty * BigDecimal(itemPrize))      println(f"\$qty%16d\t\$desc%-16s\t\$currSymbol%4s\$itemPrize%6.2f\t\$post%,25.2f")      (items, post)    }    totals.foldLeft((0L, BigDecimal(0))) { (acc, n) => (acc._1 + n._1, acc._2 + n._2)}  }   val (items, beforeTax) = placeOrder(order)   println(f"\$items%16d\t\${"ordered items"}%-16s\${'\t' + "  Subtotal" + '\t'}\$beforeTax%,25.2f")   val taxation = beforeTax * tax  println(f"\${" " * 16 + '\t' + " " * 16 + '\t' + f"\${tax * 100}%5.2f%% tax" + '\t'}\$taxation%,25.2f")  println(f"\${" " * 16 + '\t' + " " * 16 + '\t' + "Amount due" + '\t'}\${beforeTax + taxation}%,25.2f")}`
Output:
```4000000000000000	Hamburger XL    	руб.  5,50	22 000 000 000 000 000,00
2	Milkshake       	руб.  2,86	                     5,72
4000000000000002	ordered items   	  Subtotal	22 000 000 000 000 005,72
7,65% tax	 1 683 000 000 000 000,44
Amount due	23 683 000 000 000 006,16

Process finished with exit code 0
```

## Sidef

Translation of: Perl 6
`struct Item {    name, price, quant} var check = %q{    Hamburger   5.50    4000000000000000    Milkshake   2.86    2}.lines.grep(/\S/).map { Item(.words...) } var tax_rate = 0.0765var fmt = "%-10s %8s %18s %22s\n" printf(fmt, %w(Item Price Quantity Extension)...) var subtotal = check.map { |item|    var extension = Num(item.price)*Num(item.quant)    printf(fmt, item.name, item.price, item.quant, extension.round(-2))    extension}.sum(0) printf(fmt, '', '', '', '-----------------')printf(fmt, '', '', 'Subtotal ', subtotal) var tax = (subtotal * tax_rate -> round(-2))printf(fmt, '', '', 'Tax ', tax) var total = subtotal+taxprintf(fmt, '', '', 'Total ', total)`
Output:
```Item          Price           Quantity              Extension
Hamburger      5.50   4000000000000000      22000000000000000
Milkshake      2.86                  2                   5.72
-----------------
Subtotal    22000000000000005.72
Tax     1683000000000000.44
Total    23683000000000006.16
```

## Tcl

Library: Tcllib (Package: math::decimal)
`package require math::decimalnamespace import math::decimal::* set hamburgerPrice [fromstr 5.50]set milkshakePrice [fromstr 2.86]set taxRate [/ [fromstr 7.65] [fromstr 100]] set burgers 4000000000000000set shakes 2set net [+ [* [fromstr \$burgers] \$hamburgerPrice] [* [fromstr \$shakes] \$milkshakePrice]]set tax [round_up [* \$net \$taxRate] 2]set total [+ \$net \$tax] puts "net=[tostr \$net], tax=[tostr \$tax], total=[tostr \$total]"`
Output:
```net=22000000000000005.72, tax=1683000000000000.44, total=23683000000000006.16
```

## VBA

Used in locality Euroland. Formatting as currency shows € in stead of \$, and thousand separators are "." in stead of "," and the decimail 'point' is "," in stead of "." When run in the USA it will be with dollar sign and so on.

`Public Sub currency_task()    '4000000000000000 hamburgers at \$5.50 each    Dim number_of_hamburgers As Variant    number_of_hamburgers = CDec(4E+15)    Dim price_of_hamburgers As Currency    price_of_hamburgers = 5.5    '2 milkshakes at \$2.86 each, and    Dim number_of_milkshakes As Integer    number_of_milkshakes = 2    Dim price_of_milkshakes As Currency    price_of_milkshakes = 2.86    'a tax rate of 7.65%.    Dim tax_rate As Single    tax_rate = 0.0765    'the total price before tax    Dim total_price_before_tax As Variant    total_price_before_tax = number_of_hamburgers * price_of_hamburgers    total_price_before_tax = total_price_before_tax + number_of_milkshakes * price_of_milkshakes    Debug.Print "Total price before tax "; Format(total_price_before_tax, "Currency")    'the tax    Dim tax As Variant    tax = total_price_before_tax * tax_rate    Debug.Print "Tax "; Format(tax, "Currency")    'the total with tax    Debug.Print "Total with tax "; Format(total_price_before_tax + tax, "Currency")End Sub`
Output:
```Total price before tax € 22.000.000.000.000.005,72
Tax € 1.683.000.000.000.000,44
Total with tax € 23.683.000.000.000.006,16```

## zkl

zkl Ints are 64 bits, so we have 18 digits to play with. So, just multiply bucks by 100 and be careful when doing tax calculations.

Translation of: Python
`var priceList=Dictionary("hamburger",550, "milkshake",286);var taxRate=765;  // percent*Mconst M=0d10_000; fcn toBucks(n){ "\$%,d.%02d".fmt(n.divr(100).xplode()) }fcn taxIt(n)  { d,c:=n.divr(M).apply('*(taxRate)); d + (c+5000)/M; }fcn calcTab(items){ // (hamburger,15), (milkshake,100) ...   items=vm.arglist;   fmt:="%-10s %8s %18s %26s";   fmt.fmt("Item Price Quantity Extension".split().xplode()).println();    totalBeforeTax:=0;   foreach item,n in (items.sort(fcn(a,b){ a[0]<b[0] })){      price:=priceList[item]; t:=price*n;      fmt.fmt(item,toBucks(price),n,toBucks(t)).println();      totalBeforeTax+=t;   }   fmt.fmt("","","","--------------------").println();   fmt.fmt("","","subtotal",toBucks(totalBeforeTax)).println();    tax:=taxIt(totalBeforeTax);   fmt.fmt("","","Tax",toBucks(tax)).println();    fmt.fmt("","","","--------------------").println();   fmt.fmt("","","Total",toBucks(totalBeforeTax + tax)).println();}`
`calcTab(T("milkshake",2),T("hamburger",4000000000000000));`
Output:
```Item          Price           Quantity                  Extension
hamburger     \$5.50   4000000000000000 \$22,000,000,000,000,000.00
milkshake     \$2.86                  2                      \$5.72
--------------------
subtotal \$22,000,000,000,000,005.72
Tax  \$1,683,000,000,000,000.44
--------------------
Total \$23,683,000,000,000,006.16
```