A national survey shows gas prices continue to decline, tumbling nearly 53 cents a gallon in the last two weeks.

The average price of a gallon of regular gasoline at self-serve stations was $2.78 Friday. Mid-grade was at $2.93 and premium was at $3.05.

That’s according to the Lundberg Survey of 5,000 gas stations nationwide, released Sunday.

Gas was cheapest in Wichita, Kan., at $2.26 for a gallon of regular. It was most expensive in Anchorage, Alaska, at $3.50.

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On the Net:

Lundberg Survey: http://www.lundbergsurvey.com