A fireworks stand sells repeating fireworks for the following prices:

1-5 items, $19.99 each

5-10 items, $17.50 each

over 10 items, $14.99 each

Write a program that will ask the user how many items they are purchasing, calculate the cost, calculate the sales tax at 7.5% of the total cost and print a receipt to the monitor showing the number of items purchased, the cost before tax, the tax, and the total cost with tax.

Use separate functions to:

Read the number of items from the user

Calculate the cost before tax

Calculate the tax

Print the receipt

Input Validation: Make sure the number of items is greater than 0, if not, print an error message and exit the program.

Please use comments to explain functions used.