Am using "Table Rate Shipping" and we were doing fine until we encountered changed shipping fees based on a combination of weight & size. As an example if I sell "small box" alone then the shipping class "small" would calculate the correct shipping fee. If I then sell "big box" alone then the shipping class "big" works fine.
But if the client buys one "small box" and one "big box" then unless we ship in 2 separate packages, the calculated shipping fee is wrong (too low).
What I need is for system to use shipping class "big" for both items if a "small box" and a "big box" are purchased together. Possible?