asp.net membership ipn

i sell two things on my website, memberships and storage. Storage is $5 a GB a month. Users are $19.99 a month. A customer may purchase 5 user accounts and 3 extra GB of storage. I need a page that allows them to select and change this information. I also need it to allow them to modify their subscription. Please use a paypal IPN to update a transaction history table as well as a customer table (that says how many users and GB they are entitled to) ask if you have any other questions thanks ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform asp.net 2.0 C#