How short-run profit or losses induce entry or exit

Citrus Scooters is a company that manufactures electric scooters in a monopolistically competitive market. The following graph shows the demand curve, marginal revenue curve (MR), marginal cost curve (MC), and average total cost curve (ATC) for Citrus.

Place the black point (plus symbol) on the graph to indicate the short-run profit-maximizing price and quantity for this monopolistically competitive company. Then, use the green rectangle (triangle symbols) to shade the area representing the company's profit or loss.

\fGiven the profit-maximizing choice of output and price, Citrus Scooters is earning Y prot, which means there are Y sellers in the industry relative to the long-run equilibrium amount. \fWhich of the following statements are true for both monopolistically competitive markets and monopoly markets? Check all that apply. C] Firms can earn positive profit in the long run. C] Price is above marginal cost. C] Firms earn zero profit in the long run. C] Firms are not price takers