UNDATED (WKZO) - Triple-A Michigan says the price at the pump is up 5.2-cents per gallon over the past week. The statewide average now sits at $3.58 a gallon. The latest average is more than 82-cents per gallon higher than this time last year. The auto club says the cheapest gas in Michigan is $3.53 a gallon in metro Detroit. The most expensive? Traverse City, where the average is $3.64.