Modify and expand the inventory program that you wrote for the previous programming prob...

Modify and expand the inventory program that you wrote for the previous programming problem. Here are a few suggestions:

a. Add the ability to manipulate more than one inventory with the single program.

b. Add the ability to keep various statistics about each of the inventory items (such as the average number sold per week for the last 10 weeks).

c. Add the ability to modify the have value for an inventory item (for example, when a DVD is damaged or returned by a customer). Consider the implications for maintaining the relationship between a have value and the size of the corresponding wait list.

d. Make the wait lists more sophisticated. For example, keep names and addresses; mail letters automatically when a DVD comes in.

e. Make the ordering mechanism more sophisticated. For instance, do not order DVDs that have already been ordered but have not yet been delivered.