12. James decided to take a computer course. The tuition expense was $520. After the date has expired to receive a refund for the course, James is offered a job that would conflict with his class time. In making the decision to accept or decline the offer, the $520 is: A. The sunk benefit. B. The sunk cost. C. the sunk lost. D. the opportunity lost. 13. Suppose that you purchased a coffee cup from Tim Hortons for $7.00 and you can refill your cup for $0.70. The marginal cost of the 5th coffee purchased at Tim Hortons is: A. $7.00. B. $4.20. C. $0.20. D. $0. 70. 14. Suppose that you purchased a coffee cup from Tim Hortons for $7.00 and you can refill your cup for $0.70. The sunk cost of coffee purchased at Tim Hortons is: A. $7.00. B. $4.20. C. $0.20. D. $0.70. 15. In the figure shown below, point A represents: Healthcare B DE Education A. Efficient utilization of resources. B. Best production than at point B. C. Inefficient utilization of resources. D. Sufficient utilization of resources