Saran Company has contacted Truckel with an offer to sell it 5,000 of the wickets for $18 each. If Truckel makes the wickets, variable costs are $16 per unit. Fixed costs are $8 per unit; however, $5 per unit is unavoidable. Should Truckel make or buy the wickets?

a. Buy; savings= $15,000

b. Buy; savings= $5,000

c. Make; savings= $10,000

d. Make; savings= $5,000

How do I solve this?

Thank you