Regular gasoline, which peaked at $3.18 in May, dropped to $3 a gallon, oil industry analyst Trilby Lundberg said. Mid-grade averaged $3.11, and premium was $3.22.
The lowest price was in Jackson, Miss., where a gallon of regular cost $2.75. The highest average price was in Chicago at $3.39, according to the Lundberg Survey of 7,000 stations nationwide.
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