PORTLAND — A price-monitoring website says average retail gasoline prices in Maine have risen 7.5 cents per gallon in the past week to an average of $3.76 per gallon.

MaineGasPrices.com says Sunday’s prices in Maine were 87.9 cents per gallon higher than they were the same day one year ago, and 17.5 cents per gallon higher than a month ago.

The national average has increased 21 cents per gallon during the last month to $3.74 per gallon.

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