In the following exercises, write a program to carry out the task. The program should us...

In the following exercises, write a program to carry out the task. The program should use variables for each of the quantities.

Sales Write a program that allows furniture sales (item and price) to be displayed in a list box one at a time, and then shows the total commission of the sales (6 %) upon request. (See Fig. 3.28.) The user should type each item and price into the text boxes and then click on the Display button. This process can be repeated as many times as desired. At any time the user should be able to press the Show button to display the total commission of all the sales that were entered. Note: This program requires a class-level variable.