While you check out at Wal-mart, you should be watching the register. If an item scans for a different price than what is listed on the shelf tag, the store is required to give you $3.00 or to deduct $3.00 from the price of the item. This is due to a 2008 court settlement with the California State Attorney General's office.
Make sure you let the store know if you think that there has been an error. $3.00 is a BIG savings to put back into your wallet!
Ta ta for now...save money!