At present Ubercart provides options for cost and price differentials per option. My client would also like a shipping price differential per option: some options are more expensive to ship than others. The weight differential is nice, but we're using flat rate shipping, so rather than a weight differential, we need a ship price differential.
See attached image that I hope outlines what I'm talking about. So I'd like to replace "Weight" in the last column with "Shipping".