AAA Michigan says gasoline prices have increased about 7 cents during the past week to a statewide average of about $3.59 per gallon.
The auto club says Sunday the average is up about 6 cents from this time last year.
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Of the cities it surveys, AAA Michigan says the cheapest price for self-serve unleaded fuel is in the Detroit area, where it's about $3.55 a gallon. The highest average is in the Jackson area at about $3.63 a gallon.
Dearborn-based AAA Michigan surveys 2,800 Michigan gas stations daily.