2 of 16 Concepts completed Multiple Choice Question Suppose that when the price of gasoline is $3 per gallon, the total amount of gasoline purchased in the United States is 8 million barrels per day. Also suppose that when the price of gas decreases to $2.25 per gallon, the total amount of gasoline purchased is 12 million barrels per day. Based on these numbers and using the simple formula, the price elasticity of demand for gasoline is