In long-run equilibrium a competitive firm produces the level of output at which?

In long-run equilibrium, a competitive firm produces at the level of output where marginal cost (MC) equals marginal revenue (MR), which is also equal to the market price (P). This occurs at the minimum point of the average total cost (ATC) curve, ensuring that the firm earns zero economic profit. At this point, the firm's resources are allocated efficiently, and there is no incentive for firms to enter or exit the market. Thus, the firm operates at an optimal scale in the long run.