Answer:
Opportunity cost is a fictitious cost used in the assessment of alternative resource uses. The cost is the lost income from the alternative that you have not chosen to use. A standard example is when a person has a large amount of money and two options: Save them at a fixed monthly interest rate or pay off their loans. If you choose to save at a fixed monthly interest rate, the monthly cost of the loan will be the alternative cost. If, on the other hand, you choose to pay off your loans, the lost interest income will be the alternative cost.