If the store is e.g. Walmart, then their scale's already large enough that I don't think this is going to put them under. And if every store's doing it, then there'll be nowhere to turn to.

What if the stores detain you and force you to work in their perfume department to pay off the million-dollar multi-item fee they just thought up? What if they also do a bunch of allergen testing on you to figure out what you're allergic to and then make you exclusively sell perfumes containing those allergens?

All because of that darn penny-rounding.

Won't someone think of the children?