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Your logic has a hole in it. If you spent the extra dollars on gas or you spent it on cloths, you still spent it and that helped the economy. It does not matter what you spent it on, it is the fact that you spent the money.
As per GB guidelines, please only post the displayed price without the discount. You can add that there is a 3 cent discount in the comments. Not everybody gets a Wal-Mart discount card. Thank you