Tom put 18 gallons of mid grade gas in his truck and filled up his empty 5 gallon gas can with regular gas for his lawnmower at home he spent $59.91 the following week he put 14 gallons of midgrade gas in his truck in topped off his 5 gallon can with 1 gallon of regular gas if he paid $39.75 in the prices remain the same find the price per gallon of midgrade in regular gas