The average price of a gallon of self-serve regular  gasoline in the Inland Empire dropped one-tenth of a cent today to $3.545, its  lowest amount since Dec. 27, 2011.
      The average price in Riverside and San Bernardino counties is 4.8 cents  less than one week ago and 22.4 cents lower than one month ago, but 2 cents  more than one year ago, according to figures from the AAA and Oil Price  Information Service.
      A 19-day streak of decreases ended Sunday when the average price was  unchanged.