I just saw a guy shove loads of chocolate bars and candy into a big black bag, get two beers. I got curious cause usually people don’t put stuff they intend to buy into bags.
Then he proceeds to checkout but only pays for the beers, not a single beep from the sensors. Are they only meant to detect certain items or did the homeless guy have something to disrupt the sensors?
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Unless they’re using RFID technology, most supermarkets rely on optical bar code scanners.
When the candy was in an opaque bag the scanner couldn’t see the barcode.
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