Arrange the following steps in the correct order to illustrate how a firm achieves normal profit in a competitive market: A) The firm's average total cost equals the market price, B) The firm adjusts its production level based on market demand, C) The market price equalizes with the average total cost, D) The firm enters the market when it identifies potential for profit.

To achieve normal profit in a competitive market, a firm first identifies potential for profit and enters the market (D). Once in the market, the firm will adjust its production level based on market demand (B) to maximize its output and efficiency. As the firm produces, the market price will eventually equalize with the average total cost, meaning the firm isn’t making a loss or excess profit (C). Finally, when the firm's average total cost equals the market price (A), it reaches a point of normal profit, where it covers all its costs but does not earn extra profit. For example, if a firm produces shoes and the cost to make one pair is $50, it will seek to sell pairs at that price to ensure it earns just enough to stay in business without losing money.