Answer:
$-39
Explanation:
Economic cost is implicit cost less accounting cost
Implicit cost or opportunity cost : implicit cost is the cost of the next best option forgone when one alternative is chosen over other alternatives. It is used in calculating economic profit
There are two opportunities the student forgoes when he decides to go to the movies. They are, the amount he would have earned if he tutored the student which has a value of $10 / hour and the amount he would have earned working as a grader which is $15 / hour.
The next best option is $15 / hour because it has a higher value
total economic cost = 15 x 3 = 45
the cost of the ticket and the cost of gasoline are explicit costs
Explicit cost includes the amount expended in going to the cinema
6 - 45 = -39