The following numbers measure the tradeoff between grades and income:
Total Hours Hours Hours Studying GPA Working Income 60 60 4.0 0 $0 60 40 3.0 20 $100 60 30 2.0 30 $150 60 10 1.0 50 $250 60 0 0.0 60 $300
a. Calculate the opportunity cost of an increase in the number of hours spend studying in order to earn a 3.0 grade point average (GPA) rather than a 2.0 GPA.