Feature Request: Barcode Macros (for "Outer Packages" or "Variety Packs")

I buy a lot of things from Costco. A lot of their products consist of variety packs that contain smaller packages inside. For example, you can buy cases of sparking water that contain 3 boxes of 12 cans each of a different flavor. It would be nice if you could scan the outermost barcode and automatically add 12 cans of product A, 12 cans of product B, and 12 cans of product C. This wouldn’t necessarily have to be added as a product, but it would need to be a part of barcode setup. Maybe something like a barcode macro feature? An added bonus would be to accept a cost entry and automatically divide it by the number of innermost packages.