please show work! thank you!

DSP Manufacturing produces a small refrigerator that requires a motor. It has the opportunity to purchase these Motors from a reliable supplier at a purchase price of $22 per motor. Currently, DSP manufactures the motors. DSP's costs for it production of 5,000 motors are as follows: Variable Costs per Motor: Direct Materials Direct Labor Variable Overhead Fixed Costs per Motor $2.00 $8.00 $6.00 $10.00 If DSP purchases the motors, 70% of the fixed costs can be eliminated. DSP should (type make or buy) the motors, because the net income would increase by (type in the dollar amount of change)