CAMARILLO, Calif. — The average U.S. price of a gallon of gasoline has fallen about 8 cents over the past two weeks.

The Lundberg Survey of gas prices released said the price of a gallon of regular is $3.60. Midgrade costs an average of $3.78 a gallon, and premium is $3.92. Lundberg Survey President Trilby Lundberg said refiners are overproducing and cutting their wholesale prices to move product.

Of the cities surveyed in the lower 48 states, Charleston, S.C., has the nation's lowest average price for regular gasoline at $3.27 a gallon. Chicago and San Diego have the highest average price at $3.92.

CEDAR RAPIDS, Iowa — Aviation and military electronics maker Rockwell Collins said Sunday it is buying Annapolis, Md.-based ARINC from the investment firm The Carlyle Group for $1.39 billion.Cedar Rapids-based Rockwell Collins, which currently does more than half its business with the government, was seeking to add commercial customers. ARINC focuses on networks and services, while Rockwell Collins works on avionics and cabin technology.The acquisition would reduce Rockwell Collins' reliance on government contracts.