Would you go back to a store and pay for something you accidently were not charged for?

Let's say, you get home from a store, and you're looking at your receipt, and you realize you were only charged for 4 out of 5 items in your bag. Would you go back to the store and pay for the fifth item?
Would you go back to a store and pay for something you accidently were not charged for?
Yes, absolutely! I'd drive back to the store and pay for it.
Yes, I'd pay for it if I were still in the parking lot, but if I were at home already, I'd just keep it. Not wasting my gas for their mistake!
Nope, their mistake, I'm keeping it!
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Would you go back to a store and pay for something you accidently were not charged for?
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