BOSTON (AP) — The cost of a gallon of gas in Massachusetts has leapt another nine cents in the past week, and has now risen a quarter in a month.

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AAA Southern New England reports Monday that self-serve, regular is up to an average of $3.68 per gallon.

That’s a dime higher than the national average and 12 cents more than at the same time last year.

AAA found self-serve, regular selling as low as $3.56 per gallon and as high as $3.83.

Copyright 2013 The Associated Press.