Fw: Excel Spreadsheet

Hello All, I was working on a little php today and I remembered that I had another project that I wanted to do. I have a fairly complicated excel spreadsheet that helps me price a service I provide and I would like to be able to have fields on my website that can be filled in and the data passed throught the spreadsheet (through whatever manner) and the pricing info delivered back to the client. I have no idea how to do this and I thought that maybe some of you have done projects like this and would have an idea of where I should start. Thanks, Jeremy >