DEARBORN, Mich. (AP) — AAA Michigan reports statewide gas prices have increased by about 6 cents a gallon within the past week. The auto club says the average price per gallon of self-serve regular unleaded gasoline was about $2.48. That's about $1.32 less than it was a year ago. Dearborn-based AAA Michigan surveys daily fuel costs at 2,800 Michigan gas stations.