Gas Prices Continue To Rise

The national average price for gasoline rose about 13 cents over the last two weeks, according to a survey released Sunday.

The average price of regular gasoline on Friday was $3.09 a gallon, mid-grade was $3.21, and premium was $3.32, oil industry analyst Trilby Lundberg said.

The nation's lowest price was in Tucson, Ariz., where a gallon of regular cost $2.91, on average. The highest was in San Francisco at $3.48, according to the Lundberg Survey of 7,000 stations nationwide.