The average price of gasoline in the United States resumed its slide over the past two weeks, dropping 11 cents to $2.14 a gallon, the lowest since late January, according to a Lundberg survey released on Sunday. The 5 percent decline in gasoline prices came as oil refiners and gasoline wholesalers and retailers passed along lower oil-buying prices to consumers, said survey publisher Trilby Lundberg in emailed comments. Current retail gas prices were 70 cents below the year-ago period and at the lowest level since Jan. 23, when the average price was $2.07 per gallon.