E-Tunes Inc is working on a new program in conjunction with the new “pay for music” era. Your program is a simplification dealing with customer billing. The program should get from the user the number of songs “streamed” (played on-line without saving) and number downloaded (saved to disk). The program should have buttons to allow 3 different calculations – one for if the customer is a “premium” customer, one for if they are a regular customer, and one for if they are a “basic” customer. For pricing details, see below. The program should call a procedure to handle validation of inputs, and functions to calculate the cost if the inputs are valid. The program should also have a button to allow the user to explore “what-if” – to see what their activity would cost under all 3 plans. This button’s processing should include calling the same procedures and functions as the individual calculations!! (hence an advantage for using procedures/ functions!!!) Display the appropriate answers in labels or text boxes (locked of course). Provide capabilities for the four calculation options, plus to clear the input and output to start again, and to exit.
“Basic” customer
· Base monthly cost - $10 – always, no matter use
· First 100 songs streamed “free” (included in monthly fee)
· Additional songs streamed - $0.20 each
· First 5 songs downloaded “free” (included in monthly fee)
· Additional songs downloaded - $2.00 each
“Regular” customer
· Base monthly cost - $20 – always, no matter use
· First 200 songs streamed “free” (included in monthly fee)
· Additional songs streamed - $0.10 each
· First 10 songs downloaded “free” (included in monthly fee)
· Additional songs downloaded - $1.00 each
“Premium” customer
· Base monthly cost - $50 – always, no matter use
· First 1000 songs streamed “free” (included in monthly fee)
· Additional songs streamed - $0.05 each
· First 100 songs downloaded “free” (included in monthly fee)
· Additional songs downloaded - $0.50 each