oscommerce specialist for calculating values

Our web shop is heavily modified and we want to finalize the options to calculate and have it combined in one product as well. There is also few things which needs to be fixed, just small issues , like stuff which not must show up in the invoice or orders. We got a very sophisticated document which will clarify what we got, and what should happen. Most of the calculations is like here ; [login to view URL] So please only bid if you know how to work with sessions and cookies. Already got these options as example URL btw , but this is only part of a product, so if somebody orders, he can order this, the frame, glass etc, which is all combined and calculated as one. If you manage to do the work, there is enough work for the coming months ahead in other oscommerce web shops for you