According to Neal Gabler's book, Walt Disney: The Triumph of the American Imagination, the Disney brothers did not know what to charge for a feature film, especially overseas. It was Charlie Chaplin that came to the rescue...
Chaplin offered to give the Disney's all his "records and experience," most importantly his ledgers from Modern Times, which permitted Roy to press RKO to "go out and ask Chaplin prices" and get the same terms in foreign markets as Chaplin had gotten. p. 271
Modern Times released 1936.
Thanking Chaplin after Snow White's release, Walt called it an "invaluable service" and wrote "Your records have been our Bible--without them we would have been as sheep in a den of wolves." p. 271