MasterCard Inc., the Purchase-based credit card giant, said that Whataburger, a Texas-based fast food chain, Whataburger, will accept MasterCard PayPass payments at more than 500 locations across the South. PayPass, developed by MasterCard, allows consumers to tap cards or devices on the special readers at checkout to pay for products quickly. There are nearly 61 million MasterCard PayPass cards and devices in use at over 153,000 merchants worldwide, including BP, Best Buy, 7-Eleven, CVS and McDonald’s.