Answer:
Explanation:
1. Division A purchase decision
Purchase cost from outside 11,500 × 165 = $1,897,500‬
less: savings of B variable cost 11,500 × 155 = $1,782,500‬
   Net cost or benefit to buy outside = $115,000
Therefore the net cost to purchase the materials outside the company is $115,000
2. Purchase cost from outside 11,500 × 165 = $1,897,500‬
less: savings of B variable cost 11,500 × 155 = $1,782,500‬
less: savings of B material assignment = $220000
Net cost or benefit to buy outside = ($105,000)
The negative value in the benefit is due to the increased savings of division B. It indicates the Division A to buy the material from outside which is beneficial for the division.