What are three things you could buy at a grocery store to make the cashier give you weird looks?

What are three things you could buy at a grocery store to make the cashier give you weird looks?

I'd buy a kitchen knife, tape and a large trash bags.

What are three things you could buy at a grocery store to make the cashier give you weird looks?
What are three things you could buy at a grocery store to make the cashier give you weird looks?
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