Answer:
$10
Explanation:
Calculation for the marginal cost of fourth unit
Using this formula
Marginal cost = Change in Total cost / Change in number of units
Let plug in the formula
Marginal cost of fourth unit = $(50 - 40) / (4 - 3)
Marginal cost of fourth unit= $10 / 1
Marginal cost of fourth unit= $10
Therefore Marginal cost of fourth unit will be $10
