A software company sells a package that retails for $99. Quantity discounts are given according to the following table:

1) A software company sells a package that retails for $99. Quantity discounts are given according to the following table:

Quantity Discount 
10-19 20% 
20-49 30% 
50-99 40% 
100 or more 50% 

Write a program that asks for the number of units sold and computes the total cost of the purchase.

Input Validation: Make sure the number of units is greater than 0.


2)A bank charges $10 per month plus the following check fees for a commercial checking account:

$.10 each for fewer than 20 checks
$.08 each for 20-39 checks
$.06 each for 40-59 checks
$.04 each for 60 or more checks

Write a program that asks for the number of checks written durign the past month, then computes an displays the bank's fees for the month.

Input Validation: Do not accept a negative value for the number of check written.