Mighty Safe Fire Alarm is currently buying 60,000 motherboards from MotherBoard, Inc, at a price of $64 per board. Mighty Safe is considering making its own boards. The costs to make the board are as follows: direct materials, $34 per unit; direct labor, $12 per unit; and variable factory overhead, $16 per unit. Fixed costs for the plant would increase by $74,000. Which option should be selected and why? a. make. $120.000 increase in profits b. buy, 546,200 increase in profits c. nahie, 546,200 increase in protits d. buy 574.000 increase in profits