Chapter 5, Problem 6E

Consider a class that keeps track of the sales of an item. An object of this class will have the attributes

• Number sold
• Total sales
• Total discounts
• Cost per item
• Bulk quantity
• Bulk discount percentage

and the following methods:

• registerSale (n) records the sale of n items. If n is larger than the bulk quantity, the cost per item will be reduced by the bulk discount.
• displaySales displays the number sold, the total sales, and total discount.
  1. a. Implement the class in Java.
  2. b. Write some Java statements that test the class.