A customer at Trader Joe’s reported being charged for 75 tomatoes instead of the few she actually purchased, highlighting a common checkout error. In a story published by Operation Sports, the shopper explained how the mistake occurred and offered advice for other consumers.

The error was traced to a barcode scanning issue where the store’s system misread the item, multiplying the quantity. The customer only noticed the overcharge after reviewing her receipt at home. Such incidents underscore the importance of double-checking scanned items, especially for produce sold by weight or individual units.

Her crucial tip: always watch the screen as items are scanned and immediately verify the total before paying. For barcode-related errors, she advises customers to inspect packages for damaged or overlapping barcodes that may cause scanners to register the wrong product or quantity. Retailers, too, can benefit from regular barcode maintenance to prevent such mistakes.