This means that money is never circulated
Opportunity cost is something you gave up to do the other thing you want to do. This is basically the loss of potential gain you can have on a certain alternative because of choosing the other alternative. In this problem, the opportunity cost of writing the term paper is $140 dollars. This can be break-down as follows:
a. $60 opportunity cost<span> she has given up for not</span> working<span> on her job</span>
<span>b. $80 opportunity cost she has given up for not going out with a friend</span>