1) Project Details: (be as specific as possible): I am a web designer working on a site right now. I think the development part is a bit over my head on this one. My client sells dry erase boards and the pricing depends on the size but they can be cut in to lengths 1-200 feet and widths have six different choices. So 1200 possibilities. I need something where there is a text input for the length, a radio button input for one of the 6 widths. The cost is $3.25 per square foot. So i need it to calculate the size and multiply it by 3.25. Then display the cost and then display a buy now paypal link for that cost.

2) Payment method/ details (Paypal, check? Timeline?):