The U.S. average retail price of regular gasoline rose just over four cents last week to reach $3.30 per gallon. The average price is nearly $0.23 per gallon higher than last year at this time. The East Coast price increased just over five cents per gallon while the Midwest price increased almost four cents per gallon versus last week. Gulf Coast and West Coast prices both increased over four cents per gallon. The West Coast price remained the highest in the country at $3.55 per gallon. Going against the trend, the Rocky Mountain average decreased about four cents per gallon to $3.04 per gallon.