The average price for regular gasoline at U.S. pumps rose 4.74 cents in the past two weeks to $3.5572 a gallon, the highest since Sept. 20, according to Lundberg Survey Inc. The survey covers the period ended March 21 and is based on information obtained at about 2,500 filling stations by the Camarillo, California-based company. The average is 15.02 cents below a year ago. “It’s been six weeks of rising prices at the pump but this is a pace that has greatly slowed,” Trilby Lundberg, the president of Lundberg Survey, said yesterday in a telephone interview. Consumers are paying more even as oil and gasoline futures have fallen because the price for ethanol, the government-mandated fuel additive, has risen, Lundberg said. “Higher ethanol prices adds about a nickel at the pump,” Lundberg said. Ethanol prices have jumped 24 percent this month as winter weather and a shortage of rail […]