Many films that don’t have a built-in audience (such as those based on bestselling books like "The Hunger Games" or even "50 Shades of Grey") need a way to get people into the theater. Romantic comedies or some children's films need to promote themselves via TV commercials and media advertisements, and those costs add up quickly. For a movie budgeted between $40 and $75 million, its P&A budget might be over $20 million.