I'm using USPS Priority Mail Flat Rate Small Box, Medium Box, and Large Box. I want FoxyCart to modify the live rates based on Quantity. I think I have to use separate Categories to handle the dimension for each category.
That would entail a physical (actual) count of the maximum number of products that Category A, B, C, etc can fit into Small, Medium, and Large Flat Rate boxes, and modify the Live Shipping Rates to account for that.
Or, is there an easier way to do this?