A bank charges $10 per month, plus the following check fees for a
commercial checking account:
$.10 for each check if less than 20 checks were written
$.08 for each check if 20 through 39 checks were written
$.06 for each check if 40 through 59 checks were written
$.04 for each check if 60 or more checks were written
The bank also charges an extra $15 if the intial account balance is
below $400 (before any fees are applied). Design a program that asks
the user what is the initial balance of the account and the number
of checks written, and then prints the bank fees. (see examples)