FILE - This Nov. 14, 2011 file photo shows the rain-soaked handle of a shopping cart outside the Walmart store in Mayfield Heights, Ohio. Wal-Mart Stores Inc. will be testing this summe

 

              FILE - This Nov. 14, 2011 file photo shows the rain-soaked handle of a shopping cart outside the Walmart store in Mayfield Heights, Ohio. Wal-Mart Stores Inc. will be testing this summe
FILE - This Nov. 14, 2011 file photo shows the rain-soaked handle of a shopping cart outside the Walmart store in Mayfield Heights, Ohio. Wal-Mart Stores Inc. will be testing this summer an option for consumers to be able to order product on its website and then have it kept in a physical locker at the store so they can pick it up without having to wait in line or talk to a store clerk. (AP Photo/Amy Sancetta, File)