Barton Fink is a 1991 American period film written, produced, directed and edited by the Coen brothers. Set in 1941, it stars John Turturro in the title role as a young New York City playwright who is hired to write scripts for a film studio in Hollywood, and John Goodman as Charlie, the insurance salesman who lives next door at the run-down Hotel Earle. The Coens wrote the screenplay for Barton Fink in three weeks while experiencing difficulty during the writing of Miller's Crossing. They began filming the former soon after Miller's Crossing was finished.

Filming began in June 1990 and took eight weeks (a third less time than required by Miller's Crossing), and the estimated final budget for the film was US$9 million. The Coens worked well with Deakins, and they easily translated their ideas for each scene onto film. "There was only one moment we surprised him," Joel Coen recalled later. An extended scene called for a tracking shot out of the bedroom and into a sink drain "plug hole" in the adjacent bathroom as a symbol of sexual intercourse. "The shot was a lot of fun and we had a great time working out how to do it," Joel said. "After that, every time we asked Roger to do something difficult, he would raise an eyebrow and say, 'Don't be having me track down any plug-holes now.'"  Three weeks of filming were spent in the Hotel Earle, a set created by art director Dennis Gassner. The film's climax required a huge spreading fire in the hotel's hallway, which the Coens originally planned to add digitally in post-production. When they decided to use real flames, however, the crew built a large alternate set in an abandoned aircraft hangar at Long Beach. A series of gas jets were installed behind the hallway, and the wallpaper was perforated for easy penetration. As Goodman ran through the hallway, a man on an overhead catwalk opened each jet, giving the impression of a fire racing ahead of Charlie. Each take required a rebuild of the apparatus, and a second hallway (sans fire) stood ready nearby for filming pick-up shots between takes. The final scene was shot near Zuma Beach, as was the image of a wave crashing against a rock.  The Coens edited the film themselves, as is their custom. "We prefer a hands-on approach," Joel explained in 1996, "rather than sitting next to someone and telling them what to cut." Because of rules for membership in film production guilds, they are required to use a pseudonym; "Roderick Jaynes" is credited with editing Barton Fink. Only a few filmed scenes were removed from the final cut, including a transition scene to show Barton's movement from New York to Hollywood. (In the film, this is shown enigmatically with a wave crashing against a rock.) Several scenes representing work in Hollywood studios were also filmed, but edited out because they were "too conventional".Answer this question using a quote from the following article:

How many extra people did they need for this?