Write a Python program that prompts the user for the cost of two items to be purchased. Then prompt the user for their payment. If they enter an amount that is less than the total cost of the two...

Write a Python program that prompts the user for the cost of two items to be purchased. Then prompt the user for their payment.  If they enter an amount that is less than the total cost of the two items, print a message that tells them how much they still owe.  Otherwise, print a message that thanks them for their payment and tells them how much change they will receive.