Develop a program that inputs one salesperson's items sold for last week, calculates that salesperson's earnings and outputs HTML text that displays that salesperson's earnings.
A large company pays its salespeople on a commission basis. The salespeople receive $200 per week plus 9% of their gross
sales for that week. For example, a salesperson who sells $5000 worth of merchandise in a week receives $200 plus 9% of $5000,
or a total of $650. You have been supplied with a list of items sold by each salesperson. The values of these items are as follows:
Item Value
1 239.99
2 129.75
3 99.95
4 350.89
Top:
Determine a salesperson’s earnings for last week.
First refinement:
Initialize variables
Input items sold
Calculate and display salesperson’s earnings
Second Refinement:
Initialize gross to zero
While there are still product sales to input
Read number sold of product
Determine the product value and add it to the gross
Calculate salesperson’s earnings
Display salesperson’s earnings
```
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2 <!-- ex14_13.html -->
3 <HTML>
4 <HEAD>
5 <TITLE>Solution: 14.13</TITLE>
6
7 <SCRIPT LANGUAGE = "JavaScript">
8 var gross = 0.0, earnings, product = 0, number;
9 var input;
10
11 while ( product < 4 ) {
12 ++product;
13
14 // read number from user as a string
15 input = window.prompt( "Enter number sold of product #" + product + ":", "0" );
16
17 // convert numbers from a string to an integer
18 number = parseInt( input );
19
20 if ( product == 1 )
21 gross += number * 239.99;
22 else if ( product == 2 )
23 gross += number * 129.75;
24 else if ( product == 3 )
25 gross += number * 99.95;
26 else if ( product == 4 )
27 gross += number * 350.89;
28 }
29
30 earnings = .09 * gross + 200;
31
32 document.writeln( "<P>This salesperson earned " + earnings + " this week" );
33 </SCRIPT>
34 </HEAD>
35
36 <BODY>
37 <P>Click Refresh (or Reload) to run this script again.
38 </BODY>
39 </HTML>
```
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