Answer: Option (c) is correct.
Explanation:
(a) It should include the opportunity cost of making the down payment. The opportunity cost is the benefit or cost obtained from the next best alternative. While making any big decision such as purchasing house which require huge amount, hence, one should consider the opportunity cost associated with the decision.
In our case, the buyer would deposit the down payment amount in the bank, so that he will be able to earn some interest income.
(b) Interest will be =4% of $80000
= $3200
so after the year amount will be 80,000 + 3,200
= $83,200
Monthly payment = $1920 per month
Year = 1,920 × 12
= $23,040
Yearly opportunity cost will be $3,200