The program will ask the cashier to enter in the price of an item and it
will display breakdowns for the retail price, the amount of sales tax and the
total amount owing. The tax rate is equal to 7% and the total amount
owing is equal to the retail price plus the amount of sales tax.
After this the program should prompt the cashier for the amount paid by
the customer and display the amount of change that is owing.
Note: You cannot make arbitrary assumptions about the ranges of the dollar
value for each transaction. Monetary values will be displayed in dollar
values with cents being stored and displayed as fractions of a dollar.
Your program must display the fractional dollar values to a maximum of two
decimal places.