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RFID tags are already used for inventory management for some items/retailers. A system like this can just piggyback on the existing tags.

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It would need to expand to every product though, right? From produce to packs of gum, they would all need tags that can be reliably scanned by the bag/cart.

I’ve seen it at stores where each item is relatively more expensive (e.g. a Uniqlo).

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