Our goal is to order enough books so that every person who wants one will buy one. We would like to end a semester with one copy of every title still left on our shelf. When a book has been on campus for more than one semester, students will often share, and therefore the number of books we sell will be less. The higher the price, the least likely all students will buy it. Some classes rely on the book to supplement a students education.
Classes are never consistent.
These are just some of the factors used in determining the quantities. If a faculty member requested 150, we ordered 150. We do NOT make money on Textbooks. To order full increases our losses.