PLEASANTON, Calif., May 20 /PRNewswire-FirstCall/ -- Ross Stores, Inc. (Nasdaq: ROST) today reported earnings per share for the 13 weeks ended May 1, 2010 of $1.16, up from $.72 for the quarter ended May 2, 2009. These results represent a 61% increase on top of 20% growth in the prior year. Net earn