Hoping there is an easy answer to my question. I have four widgets in my store:
1. can be purchased by itself, an infinite number of times
2. minimum number sold is 5, but can increment by 1 after that
4. can only be purchased once
I've been browsing the API docs but I'm not entirely clear where I enforce this business logic. Is this tied to the item itself, in the cart, or during pay? Any assistance would be greatly appreciated!