How would you figure this out?

7. Mathematics Calculate the price consumers would pay at the pump for a gallon of gaso- line given the following costs. How does this example demonstrate the need for calculating value added when measuring GDP? . Crude oil is extracted from the ground at a cost of $90 per 40-gallon barrel. . Crude oil is transported to a refinery at a cost of 18 cents per gallon . It takes 1.25 gallons of crude oil to produce 1 gallon of gasoline. . Crude oil is refined into gasoline at a cost of 20 cents per gallon of gasoline. . Gasoline is transported to gas stations at a cost of 18 cents per gallon. . Gas station owners add 20 cents to the cost of each gallon sold