OSCommerce new cart/checkout with discounts based on manufacturer

our complete requirement is the following: ? An alternate oscommerce cart/checkout module. ? It should allow us to select from a set of discount options. This should be flexible so that other discount options can be added later. The discount options in the version 1 should be: ? 1) X+Y discount. For a set of brands (Manufacturers) that is selectable form a list there should be the option to select the X+Y option. With X an Y parameters Ideally the date at which the promotion starts and ends should be selectable: example: 15 december midnight until 17 December midnight. We are CET based and our hoster is in the US. 2) Discount on cheapest product For a set of brands (Manufacturers) that is selectable form a list there should be the option to select the discount on cheapest product. Then parameters should allow the tuning. 3) Get a set of discounts that are automatically spread over multiple products. (Similar to the above but slightly different) Customer gets Z% Y% X% W% V%. For example 2% 5% 8% 10% 15% On the cheapest product het gets Z% (2%) if he buys 1 product. or On the cheapest product het gets Y% (5%) and the second cheapest one he gets Z% (2%) if he buys 1 product. or ... When adding products to his cart the customer should see the discount directly on the product and on the total. ? ? ## Deliverables here is a more detailed description of teh project: our complete requirement is the following: ? An alternate oscommerce cart/checkout module. ? It should allow us to select from a set of discount options. This should be flexible so that other discount options can be added later. The discount options in the version 1 should be: ? 1) X+Y discount. For a set of brands (Manufacturers) that is selectable form a list there should be the option to select the X+Y option. With X an Y parameters Example: For brands/manufacturers BRAND1/BRAND7/BRAND9 buy 3 (x) and get 1 frees (Y) or buy 5 and gets 2 free. This will be manufacturer centric: Buy products from the list of “selected?? manufacturers. In a later phase we’d probably want specific products but at first the manufacturer will be enough. ? Ideally the date at which the promotion starts and ends should be selectable: example: 15 december midnight until 17 December midnight. We are CET based and our hoster is in the US. ? 2) Discount on cheapest product For a set of brands (Manufacturers) that is selectable form a list there should be the option to select the discount on cheapest product. Then parameters should allow the tuning. ? Buy 1 product and the cheapest product gets a discount of Z% (example 10%) Buy 1 product flat (x%) discount will be applicable Buy 2 products and the cheapest product gets a discount of Y% (example 20%). The other one gets no discount Buy? 3 products and the cheapest product gets a discount of X% (example 50%). The other ones get no discount Buy? 4 products and the cheapest product gets a discount of W% (example 75%) The other ones get no discount Buy? 5 products and the cheapest product gets a discount of V% (example 100%) The other ones get no discount Buy? 6 products and the cheapest product gets a discount of V% (example 100%) The other ones get no discount This will be manufacturer centric: Buy products from the list of “selected?? manufacturers. In a later phase we’d probably want specific products but at first the manufacturer will be enough. ? 3) Get a set of discounts that are automatically spread over multiple products. (Similar to the above but slightly different) Customer gets Z% Y% X% W% V%. For example 2% 5% 8% 10% 15% On the cheapest product het gets Z% (2%) if he buys 1 product. or On the cheapest product het gets Y% (5%) and the second cheapest one he gets Z% (2%) if he buys 1 product. or ... Example 2% 5% 8% 10% 15% Then write the products you want to buy next to it. Start with the most expensive one on top. Stop whenever you like. So buy 1 product and get flat fee 2% Buy 2 products then the cheapest gets 5% the second one 2% Buy 3 products. Cheapest one 8%, the following one 5% the last one ? 2%,… ? The result will be 2%;ost expensive product< 5% second expensive product 8% second cheqpest product 10%Cheqpest product 15% not used I only want 4 products ? ? When adding products to his cart the customer should see the discount directly on the product and on the total. ?