Answer and Explanation:
The computation of total avoidable costs is shown below:-
Particulars Keep old machine Buy New machine
Opportunity cost of
buying the old
machine $44,000
Purchase amount $117,000
Operating expenses $208,000
($52,000 × 4 years)
Operating expenses
($7,000 × 4 years) $28,000
Total avoidable costs $252,000 $145,000
b. The new machine cost is lower to the lower one so it can be replaced.