I would like to create a form for single product (audio sermon) where the customer can purchase it as an mp3, cd, or both. All 3 options have different pricing. The mp3 option should serve a downloadable mp3, the cd options should display delivery options, shipping costs, etc.
I understand the conditional logic to do display the form options. What I can not figure out is how the integrate the form so that the mp3 file is provided immediately for download and the cd option produces a receipt.