They're likely to push other prices up too: Tuesday's pump prices in Portland, Ore.
March 31, 2011 "We're seeing cost increases starting to come through at a pretty rapid rate," Bill Simon tells USA Today. Some will be passed along to consumers, he says.
A Wal-Mart in Los Angeles.
Robyn Beck/AFP/Getty Images
November 11, 2010 Wal-Mart offers free holiday shipping
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