Valiant Petro products refines crude oil to produce gasoline and kerosene. Joint costs incurred during the month of May were $1,800,000. Gasoline requires further processing to be marketable and hence a further processing cost of $100,000 was incurred. Kerosene also requires further processing to be marketable and hence a further processing cost of $200,000 was incurred. Gasoline was sold at $4 per gallon and kerosene at $3.50 per gallon. During the month of May, 500,000 gallons of gasoline and 600,000 gallons of kerosene were processed. What is the production cost per gallon of gasoline for the month of May using the NRV method? Assume there was no beginning inventory.