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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.

• _heimdall 3y ago
  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.
  • tylerhou 3y ago
    I’ve seen it at stores where each item is relatively more expensive (e.g. a Uniqlo).