My original plan was to create an ultra-simple shopping cart software app that interfaced with the shipper, but the scope is getting to be a little more than I bargained for. So I'm looking into this now... Assign a fixed shipping cost for each unit. This can be done when you create a button. To solve the problem of different shipping costs for different zones, we first ask the customer to specify the state where the items will be shipped to from a dropdown list. Submitting this will take them to one of 8 different (but nearly-identical) ecommerce pages, where each of the five items will be available to purchase. This means that for each of the five items that the vendor sells, we create eight buttons, each with a different shipping value based on the zone it will be shipped to. It's a little kludgey, but it's the best solution I could come up with.
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