I have Iscripts Multicart 2.4 and need shipping modifications.
Currently the generic product supports USPS, UPS and Fedex Shipping. The problem is that if a buyer purchased multiple items from a seller it charges shipping for each individual item. I need to modify the system to combine shipping charges for items purchase from the same seller.
Also the system allows each seller to set their own flat rate shipping but does not allow each seller to set flat shipping rates on individual items they list. I also need a pickup option on individual options as well.