FILE - In this Dec. 7, 2011 file photo, a shopper leaves a Costco store in Portland, Ore.
FILE - In this Dec. 7, 2011 file photo, a shopper leaves a Costco store in Portland, Ore. Rick Bowmer AP
FILE - In this Dec. 7, 2011 file photo, a shopper leaves a Costco store in Portland, Ore. Rick Bowmer AP