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and if you learn about barcodes and such, its easy to get a bottle of whiskey for 1.00$

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Explain how...

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You find an item, that has a coupon. A lot of times jack daniels will put a 1.00$-5$ off coupon on a bottle, for your next purchase. You get barcode creation software (easy to find), you alter the numbers at teh bottom of the barcode ...ie

230482 003 9080011

the 003 is the amount of the coupon, in this case 3$, you then alter that to say, 015 (15$), and then you print them up. You can really only do this at the self checkouts becasue its suspicious otherwise.