What is a price taker?
Firms that have no control over the price set by the market. They “accept” the price determined by the overall supply and demand conditions that regulate the market.
What is the profit maximizing rule?
It states that profit-maximization occurs when the firm chooses the quantity that causes marginal revenue to be equal to marginal cost, or MR=MC.
Conditions for profit
P>ATC: The price is greater than the average total cost of production