PURCHASE a pair of shoes that can be later returned (at least 30 minutes following the shop).
Kind of ambiguous. I've always read that as buy a pair of shoes that are returnable (as opposed to clearance or something that can't be returned) and return them 30 minutes later. Perhaps I'm wrong. The same MSC put "suggested scenarios" in the guidelines once and complained because I read that as it was suggested but not mandatory so I used a different scenario so......who knows what they mean.