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CAMARILLO, Calif. - The national average price for regular gasoline rose about 15 cents in the last two weeks, according to a survey.

The average price of self-serve regular gasoline on Friday was $3.62 a gallon, up 15 cents from two weeks ago. Mid-grade was at $3.74 and premium was $3.85. That's all according to the Lundberg Survey of 7,000 stations nationwide released Sunday.

Regular gasoline is up 55 cents since 2008 began.

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Of the cities surveyed, the cheapest price was in Cheyenne, Wyo., where a gallon of regular cost $3.39, on average. The highest average was in San Francisco at $3.95.

Across California, the statewide average for a gallon of regular was $3.90, mid-grade was at $4.01 and premium at $4.11.