Suppose that Amazing Spider-Man 2 comes out, and hundreds of people arrive at a theater and discover that the movie is already sold out. Meanwhile, the theater is also showing a boring movie in its third week of release in a mostly empty theater. Why would the theater charge the same price of $7.50 for a ticket to either movie, when the quantity of tickets demanded is much greater than the quantity supplied for one movie, and the quantity of tickets demanded is much less than the quantity supplied for the other?