297845 OSCommerce Customization

I need sufficient programmer to complete a project. The shopping cart system uses session arrays to manage cart contents. I need to add items to the session array and calculate product discounts for every product item in the session cart who has the same discount price model id. Need someone who can come in and work with me to finish project. Code is 70% complete. 2 more customizations to follow. May pay incentive for quick delivery and participation for qualified individual.