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That's according to the Lundberg Survey of fuel prices, released Sunday, which puts the price of a gallon of regular at $3.55.
Midgrade costs an average of $3.72 a gallon, and premium is $3.85.
Diesel dipped 7 cents to $4.08 a gallon.
Of the cities surveyed in the lower 48 states, Memphis, Tenn., has the nation's lowest average price for gas at $3.11. San Francisco has the highest at $4.05.