Gas tops $3 a gallon, hitting 25-year high.

NEW YORK - The average retail price of a a gallon of gasoline topped $3 in the United States last week, the highest price in 25 years, according to the latest nationwide Lundberg survey released Sunday. The national average for self-serve, regular unleaded gas was $3.0150 per gallon on July 21, a rise of almost 2 cents per gallon from two weeks ago when the average was $2.9952, the survey of about 7,000 gas stations said.