Answer:
3 units
Explanation:
Each unit sells at $3. We can calculate this by dividing $90 by 30 units = $3 per unit.
Since the total revenue with the sixth worker is $126, the total output = $126 / $3 = 42 units
Marginal product of the sixth worker = total output with six workers - total output with five workers = 42 - 39 = 3
Marginal product refers to the change in total output resulting from an increase in the number of inputs (workers in this case).
