Gas prices: Up 12 cents in two weeks

Gas prices are highest in Los Angeles at $4.35 a gallon and lowest in Denver at $3.36. Survey finds that average premium gas prices are at $4.07.

A commuter drives past a gas station signage displaying current prices for self serve and full serve gasoline in La Jolla, Calif., last week. Average gas prices have climbed to $3.81 a gallon.

Mike Blake/Reuters

March 12, 2012

The average U.S. price of a gallon of gasoline has jumped 12 cents over the past two weeks.

That's according to the Lundberg Survey of fuel prices, released Sunday, which puts the price of a gallon of regular at $3.81.

Midgrade costs an average of $3.96 a gallon, and premium is at $4.07.

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Of the cities surveyed, Denver has the nation's lowest average gas prices at $3.36. Los Angeles has the highest at $4.35.

In California, the lowest average price was $4.23 in Fresno. The average statewide for a gallon of regular was $4.32.