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Machine Vending Free Product

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Hey guys,

The snack vending machine I have is dispensing free product. Basically what’s happening is when a client puts in a $5 bill or uses their credit card the machine gives them their money back and STILL dispenses the product. If I put $1’s in, it will vend properly, however, whenever a card is used or $5 is used it will still vend and give clients their money back.



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