I doubt a single Wegmans store outsells a single busy gas station. Everyone buys smokes at a gas station…
It’s nice to throw out numbers like 3%, but it’s such a common fallacy to assume that x (small) percent of people do/will do something. “If we can just get 1% of the market share…”
I can damn near guarantee that 3% of people checking out at Wegs have cigs. I bet not even 1% do.