16. What is the difference between the terms unit billing and condensed billing? Under what conditions would you recommend unit billing and when condensed billing?
17. What is the best plan of facilitating the filling of orders where there are a large number of floors or departments and where each day's orders are supposed to be filled upon the day the orders are received?
18. Why should a plan which is highly satisfactory in a small concern prove to be an absolute failure in a large one?
19. What is meant by split orders?
20. Describe the different forms of punched holes of loose-leaf sheets and why the closed-hole punching is not adapted for use with records which are to be removed and replaced in binders from time to time.
21. Describe the different forms of binders with which you are familiar.
22. In printing invoices what is the best plan of designing the headings in order to facilitate the execution of the invoice on billing machines? Would you pay any attention to the space between the lines of the heading and to the distance between the last line to be typewritten on the heading and the first line to be typewritten on the invoice?
23. Explain the mistakes made in using carbon paper, and under what conditions you would use the various weights of carbon paper.
24. Explain what is meant by a blind.
25. Explain what is meant by credit memoranda, and tell how to use them in connection with a sales book instead of having to use a separate credit sheet.