The diagram at right shows the structure of cost and demand facing a monopolistically competitive firm in the short run. The profit-maximizing output level is units of output. (Enter your response as an integer.) The profit-maximizing price is $. (Enter your response as an integer.) Total revenue is $ (Enter your response as an integer.) Total cost is $. (Enter your response as an integer.) Total profit or loss is $ (Enter your response as an integer and include a negative sign where appropriate.) In the long run, firms will OA. exit, shifting the demand facing the remaining firms to the right until the firms earn an economic profit. B. exit, shifting the demand facing the remaining firms to the right until the firms earn a normal profit. OC. enter, shifting the demand facing the remaining firms to the left until the firms earn a normal profit. OD. enter, shifting the demand facing the remaining firms to the left until the firms earn an economic profit. $14 $13 $12 $11 $7 MR 15 20 Quantity MC D ATC