6) To follow is information about the units produced and total manufacturing costs for Pine Enterprises for the past six months Month January February March Number of units produced Total manufacturing costs 7,800 7,500 6,600 6,800 4,500 7,000 $8,150 $8,000 $7,550 $7,650 $6,500 $7,750 May une Using the high-low method, what will the total monthly manufacturing costs be if the company produces 9,000 units? A) $8,750 B) $4,250 C) $8,400 D) $4,500