Walmart (the parent company of Sam's Club) has been testing a service called Shop & Go for several years now. The idea is that you shop normally, scan in items with a barcode app, pay from the app via a credit card/debit card/store payment system, then just walk out the door - no need to go through a checkout line at all. Previously the program was limited to only a few hundred stores and it only worked on the iPhone, but it looks like the company is ready to put a more widespread version out for the Sam's Club bulk retailer stores.

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