There are three seating categories at a high school athletic stadium. For a baseball game, Class A seats cost $15 each, Class B seats cost $12 each, and Class C seat cost $9 each. Create an application that allows the user to enter the number of tickets sold for each class. The application should be able to display the amount of income generated from each class of ticket sales and the total revenue generated. If the user fails to enter numeric values, display an appropriate error message and do not attempt to perform calculations. The application's form should resemble the one shown in Figure 3-59.
FIgure 3-59: see image.
Use the following test data to determine if the application is calculating properly:
| Ticket Sales | Revenue |
| Class A: 320 | Class A: $4,800.00 Class B: $6,840.00 Class C: $8,010.00 Total Revenue: $19,650.00 |
| Class A: 500 | Class A: $7,500.00 Class B: $9,000.00 Class C: $10,800.00 Total Revenue: $27,300.00 |
| Class A: 100 | Class A: $1,500.00 Class B: $3,600.00 Class C: $4,500.00 Total Revenue: $9,600.00 |