Answer:
A- $ 50 Electricity
 $ 75 Office suplies
 $ 125 Total explicit costs
B- $ 300 Rent
 $10000 Lost of salary for quitting his job
 $ 10300 Total implicit cost
C- $ 125 Total explicit costs
 $ 10300 Total implicit cost
 $ 10425 Total economic cost
Step-by-step explanation:
A- Explicit costs are observable (such as salaries paid to employees, material costs, taxes, etc.) and are paid with cash.
B- Implicit costs are those incurred for giving up an alternative use of a specific resource, but no cash outlay is made. In this case, $ 300 that is no longer earned by using the garage as an office and $10000 lost each month for quitting his job.
C- The sum of the implicit and explicit costs determines the total economic cost
.