I'm starting an apparel store and will use more than one vendor. Each vendor has different pricing on shipping as well as Shopify having shipping rates. I would like to offer free shipping but need to be able to average the shipping costs. My confusion begins with Vendor + Shopify shipping rates which appear as 2 different figures. Certainly I won't pay for shipping from vendor & shopify.
Does anyone use different vendors and offer free shipping? How did you do arrive at your shipping costs?