(AP) — The average U.S. price of a gallon of gasoline has jumped eight cents over the past two weeks.

The Lundberg Survey of fuel prices released Sunday says the price of a gallon of regular is $3.67. Midgrade costs an average of $3.85 a gallon, and premium is $3.99.

Diesel was up four cents at $3.93 gallon.

Of the cities surveyed in the Lower 48 states, Charleston, S.C., has the nation’s lowest average price for gas at $3.34. Chicago has the highest at $4.10.

In California, the lowest average price was $3.83 in Sacramento. The highest was in Los Angeles at $4.04. The average statewide for a gallon of regular was $3.97, an increase of two cents.