I have a shopping cart rule and I haven't been able to figure out how to make it work. Any help would be appreciated.
Here it is:
A customer can buy 2 skus from a category, but they must not be the same sku. If they do, they get a third, specific sku at a discount.
The first part is the part I'm stuck on. How do I make a rule for 2 skus from a category that are not the same product?