FBA like model for cs-cart MVE


we’re planning to offer a service similar to Amazon’s FAB (fulfillment by Amazon). We will handle the inventory, shipping and handling. The vendors will still have their own separate vendor accounts in cs-cart. The problem is that we are shouldering the shipping cost (since we handle fulfilment for the vendors). The problem is that the vendor balance will always return total + shipping. We just need the product total to be paid to the vendor.

I’m avoiding the two options below

  1. modify core functionality (altering calculation)
  2. performing manual computation when paying out vendors.

    Any ideas how I can workaround this problem?