Gas prices highest since early November.

U.S. retail gasoline prices jumped another 3.5 cents over the last week to the highest level since early November, the government said Monday. The national price for regular unleaded gasoline averaged $2.37 a gallon, up 31 cents from a year ago, based on the federal Energy Information Administration?s survey of service stations. Pump prices have risen 11.2 cents in the last two weeks as gasoline demand picks up with the busy U.S. spring driving season getting underway.