CHICAGO, May 27 (Reuters) - Wal-Mart Stores Inc. on Saturday estimated that May sales rose 2.3 percent at its U.S. stores open at least a year, the low end of its forecast, held back by steep gasoline and utility prices. The world's biggest retailer had forecast growth in the range of 2 percent to 4 percent.
"We continue to see higher gasoline and utility prices affecting our customers," Wal-Mart (Research) said on a recorded message, echoing cautious comments made earlier this month by Chief Executive Officer Lee Scott
