Chapter 3, Problem 3.18E

(Sales-Commission Calculator) One large chemical 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 chemicals in a week receives $200 plus 9% of $5000, or a total of $650. Develop a program that will input each salesperson’s gross sales for last week and will calculate and display that salesperson’s earnings. Process one salesperson’s figures at a time. Here is a sample input/output dialog:

Enter sales in dollars (-1 to end) : 5000.00

Salary is: $650.00

Enter sales in dollars (-1 to end) : 1234.56

Salary is: $311.11

Enter sales in dollars (-1 to end) : -1