The average price for gas in Massachusetts is $3.839 a gallon in the latest weekly survey from AAA, down 5 cents from the previous week’s average, AAA Southern New England said Monday. The current national average is $3.78 a gallon, AAA Southern New England said. A year ago at this time, the the Massachusetts average price was $3.42, AAA Southern New England said. AAA’s weekly surveys focus on self-serve, regular unleaded gas.
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