Complex paypal button

I need complex paypal code. I want to offer few services "mixing, mastering, mixing&mastering, Promotion One, promotion two, promotion three" Each of this services will have different prices. Then customer should be able to choose how many songs he want to order "one, two, three, four etc." and price should be multiplied. I'm foreigner so it's hard to explain for me. I just wanna give to my customers free choice of his ordered service, and number of songs. They SHOULD have option to choose various services and various numbers of songs. For example: Two songs for mastering, one song mixing and mastering and five songs using promotions* " If that will be better way, you can create 3-4 different codes and I will create some 3-4 tables and this can be looks like pricing table. *My promotions will be descibed on my website so don't worry about coupons etc. Treat this like normal service. I will be using this code in soundclick page, so I think we must focus only on paypal ! Send me your ideas as well!