Mighty Safe Fire Alarm is currently buying 57,000 motherboards from Motherboard, Inc., at a price of $63 per board. Mighty Safe is considering making its own boards. The costs to make the board are as follows: direct materials, $28 per unit; direct labor, $12 per unit; and variable factory overhead, $16 per unit. Fixed costs for the plant would increase by $71,000. Which option should be selected and why? Oa, make, $327,750 increase in profits Ob. buy, $327,750 increase in profits Oc. buy, $71,000 increase in profits Od make, $399,000 increase in profits