Have you wondered how cinema operators make their money?
Cinemas have 3 major sources of revenue: the movie tickets, the concessions, and the onscreen advertisements.
When you pay $10 for your ticket, who gets that money? Basically most of the money goes back to the movie studio. The movie studio leases the movie to a cinema for a set period of time. In the first couple of weeks of the movie opening, the cinema only gets to keep about 20–25% of the collection. The percentage decreases on each week that a movie is in the cinema. If the screening was arranged by an independent distrbutor, he also takes a slice.
Everybody buys snacks at the concession stand. Without the concession stands, cinemas could not stay in business. For a $5 popcorn that they sell, the cost is only 50 cents. A $3 Coke costs only 10 cents to the cinema. Imagine the amount of money they make from the other snacks.
Sometimes studios also pay cinemas to show trailers. Advertisements that play before the main movie also make money for the cinemas. Advertisers will pay the cinemas to screen their ads. If the movie is a blockbuster, the cinema might charge higher.
The costs of running a cinema include the price of leasing the building (or floor space), equipment and maintenance, the cost of leasing the actual films, and the cost of paying their employees.
For more info, here's an interesting article on The Cost of Going To The Movies.