A producer of kitchen tools has estimated the following short-run production function for their spatulas, which they produce in a plant using labor. Labor, on average, costs the firm $15.50 an hour. The marginal revenue the firm receives from each shovel is $43.

Q= 6.7 + 8L -1.9L²

A. What is the optimal amount of labor-hours the firm should use?

B. At this level of labor, how many spatulas are produced?