Answer: See explanation
Explanation:
With the information given in the question, the firm should change its spending on labor and capital by increasing its labor and at thesame time, also reducing capital.
This is because since the marginal product of labor is 40 truffles and the price of labor is $10 per unit, it means that 4 truffles/dollar is being spent on labor, while for capital, 3 truffles/dollar is being spent.