Add A simple shopping cart app

[SaraSp]

As a user, I can create and save a shopping cart for a person. A shopping cart is associated with one person. A shopping cart may have 0 or more items in it, and can include one or more of an individual item. A person may have 0 or 1 live shopping carts. When a person purchases a shopping cart, an order that includes the items in the shopping cart is created and saved.

As a user, I can see a list of the orders for each person.

Value: Provide example app to illustrate services and capacity.

I'm working on this, but need lots of help! Open questions: how to handle abandoned shopping carts? anonymous shopping carts?