Gas prices in Michigan are up four-cents a gallon in the past week.

Triple-A Michigan says the average price is now three-dollars-20-cents a gallon, 19-cents lower than last month and down 26-cents from last year. A 15-gallon fill up costs 48-dollars on average in the state.. The state's highest price is in Jackson at three-28, and Benton Harbor's three-17 is the lowest average in the state.