I have an upcoming project in which the client will require registered users to enter food orders (for delivery). here's how it will go:

1. user logs in
2. user fills out an "order" specifying the quantities required for each item (list of up to 50)
3. completed order is "sent" (?.... or retrieved by) to an administrator who will put process it by ordering all the quantities required.
4. (note: the list of available items will change a bit from week to week)

Does something exist that would allow me to do this that I could jumpstart from ?

Thanks,