In the short run, what is the quantity that Stiff Shirt produces, the price it charges, its economic profit, markup, and excess capacity? In the long run, will new firms enter the shirt market or...

In the short run, what is the quantity that Stiff Shirt produces, the price it

charges, its economic profit, markup, and excess capacity?

In the long run, will new firms enter the shirt market or will firms exit from

that market and will the price of a shirt rise or fall? Explain your answer.