19. Consider the following information for OVERHEAD (the total OH for the company is made up of only these 3 accounts): At a Level At a Level Indirect materials (a variable cost) Factory depreciation expense (a FC) Factory maintenance (a mixed cost) Total OH $60,000 $60,000 $180,000 S230,000 At a level of 30,000 labor hours, factory maintenance cost would be: a. $50,000 $80,000 c. $100,000 d. $110,000