BOSTON (AP) — The cost of gasoline in Massachusetts has crept up another 4 cents per gallon in the past week.

AAA Northeast reports Monday that self-serve, regular is now selling for $2.25 per gallon.

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That’s 17 cents higher than a month ago but still $1.21 per gallon lower than at the same time last year. The Massachusetts price is also a nickel below the national average.

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AAA found self-serve, regular selling for as low as $1.90 and as high as $2.35 per gallon.

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