Here is a an example. A good 3 module structure will be needed in this one however that is stated and thank you.

The MoneyNow Finance Company needs to update their monthly credit card billing process. Use three module that you develop and if's approach to create this program In the main module declare global variables. Prompt users for user information such as name, the balance, total purchases, etc. There should be a module to determine finance charge and interest. The output module should indicate the appropriate billing information such as finance charges, interest, and the new balance. . . . If the amount subject to finance charge is $250.00 or more, interest must be calculated at 1.5 percent. If the amount subject to finance charge is less than $250.00, interest is calculated at 1 percent