I have a customer who has a custom addon to oscommerce, that basically takes a skin id and works like a referral system, but also does things like grab a custom header/footer logo. what he is trying to do now is take the limited sales tracking we have in place and make it a little more robust, in that he will have a couple commission levels based on a product, which I think will best if placed in the product's description/insert page.. Currently the owner of the skin is recorded so no work is needed there, but where it gets tough is the system needs to do "sliding commision payouts" and I can explain this in a lot more detail, but basically say there are 4 commission levels per product, $1-$500 $501-$1000 $1001-$2500 $2500+ if someone sells for their skin $50 of product A, and $2000 of product B, then they get the commision rate for product A as if they sold $2000 of that. I prefer US programmers only on this one as I think a explanation over the phone may be needed. I need the project done in the next couple of days, and of course I believe my budget is set accordingly. Please note in your bid US programmers, so that I know you are placing a real bid, and just not some generic response.