Form Plugin with Purchase options

I was looking through the plugins page and couldnt find what I was looking for so I figured I would see if anyone had a solution for me.

Im looking for a form plugin that I can build like a purchase / registration sheet. Basically they would fill out there basic info and then have multiple options to purchase event tickets and goodies. So I would need it to add up items that they select and have a paypal purchase at the end.

Any ideas?