Stores make push in scan-and-go tech, hope shoppers adopt it

Amazon's new grocery store allows its members to literally grab and go. Just before checking out, Tony D'Angelo uses the BJ's Express Scan app to scan in a propane tank he is purchasing at the BJ's Wholesale Club in Northborough, Mass. For customers, scanning as they go can be faster and make it simpler to keep track of spending. NEW YORK -- Shoppers at self-checkout lanes scanning all their groceries after they're done shopping? More stores are letting customer tally their choices with a phone app or store device as they roam the aisles.