. Sally, a stockbroker, has to decide whether to return to university to study for MBA. The MBA will take 3 years to complete. Following are the information that sally has:

a)MBA fees will cost $20,000 per year

b) her salary as a stockbroker is $80,000 per annum

c) during her time studying she could work as a tutor at the university and earn $10,000 per year

d) other costs of studying such as textbooks etc would cost $5000 a year

e) her salary as a stockbroker would be $150,000 per annum with an MBA.

What are the (yearly) opportunity costs of doing an MBA?