Answer:
Step-by-step explanation:
Make Buy Net income
Variable manufacturing costs $54,000 $0 $54,000
Fixed manufacturing costs $27,000 $27,000 $0
Purchase price $0 $67,500 -$67,500
Total annual cost $81,000 $94,500 -$13,500
Conclusion: Manson Industries should make the part as making part save cost than buying it.
Workings
Make Buy
Variable manufacturing costs 13500*4 0
Fixed manufacturing costs 13500*2 13500*2
Purchase price 0 13500*5