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Wal-Mart extends "scan-and-go" option to more stores
Wal-Mart has added its mobile self-checkout option at 40 Denver-area stores, after launching the first tests of the scan-and-go system at stores in four other markets. Shoppers use their smartphones to scan each product's barcode as they fill their carts, then the application generates a QR code that's scanned at the self-payment kiosks.
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