If you do not purchase your printer paper in bulk these may very well be your additional costs; 1. As many as 10 trips to Staples to purchase the paper 2. Not being able to complete your work/project because you ran out of paper and its after midnight 3. Awake the rest of the night thinking about what you were not able to finish. 4.Not to mention the price advantage of bulk buying. From "Learned by Experience"