Like a good economist, you calculated the opportunity cost of getting your college degree. Suppose that at your university, you will pay $10,000 each year for tuition, $2,500 each year for textbooks, and $10,000 per year for room and board. Before you left for college, your boss at your high-school job offered you a job paying $20,000 per year. Assume that if you decided not to go to college, your parents would not let you live at home. What is your opportunity cost for four years of college?

The opportunity cost is $130,000 for the four year duration.

Explanation:

Here, it is clear that I will not go to the job, so going to university is the only option left. Now, the loss of the job income is also an opportunity cost with an amount $20,000 which will aggregated with the University specific costs.

University Specific cost for 4 Years = 4 * (Tuition Cost + Textbooks + Job Opportunity loss)

The room and board cost is common between college and the university so it must not be considered for the decision making.

By putting values, we have:

University Specific cost for 4 Years = 4 * ($10,000 + $2,500 + $20,000)

University Specific cost for 4 Years = $130,000 for the four years

The opportunity cost is $130,000 for the four year duration.

For better understanding of relevant costing (Opportunity cost analysis), consider the following question:

i mean, there is a lot of homeless people. but it is a very busy place and always in need for people who can be busy so it's not impossible to find one.