Design a program for a cafe that will allow a user to gather some customer market research data. When a customer places an order, the clerk will ask for the customer's age and zip code. The clerk enters that data as well as the number of items the customer orders. The program operates until the clerk enters a zero for the zip code at the end of the day. At the end of the day, the program will display the following:
- A count of the number of items ordered by all customers.
- A count of the number of items ordered by customers under 30.
- A count of the number of items ordered by customers over 65.
- A total count of how many customers ordered items.