Write some Software

I need a modification to UberCart in order to calculate shipping costs by product vendor. The costs will be a fixed rate. Each vendor may select the percentage of shipping costs they will pay for. The customer will pay shipping costs that are not covered by the vendor. The vendor selects a shipping rate percentage by selecting from a Taxonomy on their profile page. Example: There are 4 items in the Shopping Cart from 3 different vendors. 2 products are from Vendor 1, and there is 1 product each from Vendor 2 and Vendor 3. The flatRate is set on the Taxonomy from which the vendor selects in their profile. Vendor 1 has selected to pay 100% of shipping costs. Vendor 2 has selected to pay 50% Vendor 3 has selected to 0% of the shipping costs. Shipping costs will therefore be: 0% * flatRate + 50% * flatRate + 100% * flatRate I also need products in the cart to be displayed in a list, grouped by vendor. I'm looking for someone who knows Drupal 7 and Ubercart well who can implement this modification very rapidly (before Sunday!).