Blondie's Reward (1948)

Dagwood is tricked into buying some swamp-land for Mr. Radcliffe, his boss, and, as a result, is demoted to office boy. However when Radcliffe discovers the lands real value he rushes to the Bumstead home to prevent Dagwood from re-selling the land back to the crooks. Blondie is way ahead of both men on getting this handled.