Why is the intersection of the marginal cost and marginal revenue curves significant in perfect competition?

If a firm sells 100 units at a price of \$15 each, and the average total cost is \$12, what is the total profit?

A dairy farmer in a perfectly competitive market notices that the market price has fallen below his average total cost. What should the farmer consider doing in the short run?

Given a graph where the marginal cost curve intersects the marginal revenue curve at a quantity of 50 units, what does this intersection represent?

If a firm's marginal cost exceeds its marginal revenue at the current level of production, what should the firm do to optimize its production?

In a perfectly competitive market, if the price is \$22, the average total cost is \$20, and the firm produces 100 units, what is the firm's total profit?

A wheat farmer in a perfectly competitive market notices that the market price has fallen below his average total cost. What should the farmer consider doing in the short run?

Under what condition does a firm break even in a perfectly competitive market?

What does the marginal cost curve represent in a perfectly competitive market?

On a graph, if the price is \$30, the average total cost is \$25, and the firm produces 40 units, what is the profit per unit?