To follow is information about the units produced and total manufacturing costs for Varied Resources Inc. for the past six months. Month January February March April May June Number of units produced 8,000 7,500 6,600 6,800 4,000 7,000 Total manufacturing costs $8,600 $8,000 $7,550 $7,650 $6,600 $7,750 Using the high - low method, what is the monthly fixed manufacturing cost? (Round any intermediary calculations to the nearest cent.) A. $4,600 B. $15,200 C. $2,000 OD. $4,000