When we think of movie studios, we think of them making story films. Nowadays we think of feature-length movies, which can run anywhere from 90 to 200 minutes. Earlier, they produced movies of shorter lengths, but they were also story films. However, almost from the beginning, they also produced industrial films, often films sponsored by commercial firms to hawk their wares and services. This is an industrial film.
So what are they selling? National Cash Register! Not just the registers, which are still common sights, but their systems for tracking sales. This one does so by showing the chaos caused by lack of system, and contrasts it with an NCR business.
It's the earliest appearance of Ralph Graves, whose career as a leading and supporting actor extended to 1949.