Answer:
b. $165,000 decrease
Explanation:
The total cost per year if Concierge Industries purchase the component outside is $510,000 (= $12.75 x 40,000 components per year)
But Concierge Industries can rent its unused manufacturing facilities for $45,000 if it purchases the component from the outside supplier
So the income/ loss if Concierge purchases the component from the outside supplier
= saving of manufacturing cost $300,000 + rental of $45,000 - $510,000 cost paid to outside supplier
= ($165,000)