Credit card integration for website

I need this: From a list of 10 applications buyer should be able to choose any 6 of them ( first step ) and do a checkout paying only for a package deal of $49.99. ( second step ) After payment is confirmed ( third step ), user will be redirect to another page to download whatever applications he has selected, together with a serial number for each of the applications selected. Also, he will received an email with the same information: ID , SERIAL NUMBER FOR EACH APPLICATION, ECT. ## 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 Linux