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(Iowa) -- Gas prices are down slightly on Thanksgiving Day.
Triple A reports the average price for regular unleaded in Iowa is $3.31 a gallon, a drop of 4 cents from Wednesday. Iowa's average gas price remains well below the national average of $3.58 a gallon for regular unleaded. Triple A says the cheapest gas in Iowa is found in Mills County, with an average price of $3.08 a gallon.