Answer:
a. $5.00
Step-by-step explanation:
Marginal cost is the cost of each extra unit sold or produced.
Average total cost is the average cost of all the units which is sold or produced during the period.
Marginal cost can be calculate by the total cost divided by the numbers of unit.
Marginal Cost of last bucking = Daily Wage / Marginal Product of Last worker
Marginal Cost of last bucking = $60 / 12 bucking
Marginal Cost of last bucking = $5 per bucking