... Gallon of Ethanol Net feedstock cost per gallon of ethanol is equal to the value of the feedstock minus the value of byproducts divided by the number of gallons of ethanol produced per unit of ... imports, and others helped increase the 3production of ethanol during the 1980s. Government regulations, such the Clean Air Act Amendments of 1990, the Energy Policy Act of 1992, and the Energy ... its value depends on the price of gasoline. In recent years, the price of ethanol in the U.S. has followed the price of gasoline (adjusted for energy content relative to gasoline) plus the...