Your Corporation has provided the following production and total cost data for two levels of monthly production volume. The company produces a single product. Production volume in units 6,500 4,800 Cost 1 $81,250 $60,000 Cost 2 $121,875 $90,000 Cost 3 $197.750 $191,800 Cost 4 $110,000 $110,000 Cost 3 would best bo described as a A. variable cost B. fixed cost c. mixed cost