Final answer:
The Murakami Oyster Company's profit-maximizing output level in 1912 was 40 cwt of MOP per month, based on the intersection of marginal revenue and marginal cost.
Step-by-step explanation:
The profit maximizing output level of the Murakami Oyster Company in 1912 can be ascertained by determining the quantity where marginal revenue (MR) equals marginal cost (MC). According to the information provided, this intersection occurs at a quantity of 40, which means that the Murakami Oyster Company would maximize its profits by producing and selling 40 cwt (hundredweight) of MOP (Murakami Oysters Product) per month in 1912.
This is a fundamental concept in microeconomics where firms in various market structures attempt to maximize profits by finding the output level where MR equals MC.