The U.S. average retail price for regular gasoline decreased six cents from the previous week to $2.38 per gallon as of September 14, 2015, $1.03 per gallon lower than at the same time last year. The West Coast price fell 10 cents to $2.99 per gallon. The Midwest price decreased seven cents to $2.28 per gallon. The East Coast, Gulf Coast, and Rocky Mountain prices each declined five cents, to $2.26 per gallon, $2.09 per gallon, and $2.68 per gallon, respectively.