Gas prices drop more than 9 cents in 2 weeks May 23, 2010 at 8:07 PM CDT - Updated June 21 at 2:13 PM CAMARILLO, Calif. (AP) - The average price of regular gasoline in the United States has dropped 9.25 cents over a two-week period to $2.83. That's according to the national Lundberg Survey of fuel prices released Sunday. Analyst Trilby Lundberg says the average price for a gallon of mid-grade was $2.97. Premium was at $3.08. Jackson, Miss., had the lowest average price among cities surveyed at $2.62 a gallon for regular. San Francisco was highest at $3.10. Diesel was at $3.09, down 5.56 cents from two weeks ago. In California, the average price for a gallon of regular dropped 6.85 cents to $3.05. Bakersfield had the state's least expensive gas at $3.00 a gallon. As usual, San Francisco was the steepest at $3.10. Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.