You are going to decide whether you will attend courses at the University for 8 months this summer. The cost of fees and books amounts to $1,700, the rent and other expenses will cost $600. If you don't attend the courses and stay at your parents' home with no cost, your parents will take care of your nutrition and other expenses. Furthermore, if you don't attend the courses you could work at a full time job.
The best job you could get will give you $600 per week but you are not willing to work at a job which offers less than $750 per week. If you attend summer courses you will have to devote 40 hours per week for studying and for attending courses.
Suppose that you have decided to attend the summer courses. Explain your decision by using the concepts of the marginal cost and marginal benefit.