Wal-Mart is in the process of testing an iPhone checkout system. The technology allows shoppers to scan items using their iPhones and pay at a self-checkout counter, a procedure that could reduce checkout times and reduce associated labor costs. A Wal-Mart super center in Rogers, AR near the company's headquarters was selected for employees to participate in the test. Wal-Mart is hoping that the move could save a portion of the $12 million spent in cashier wages every second at its US stores.