Suppose there is a service that allows college students to obtain textbooks for only a portion of the cost. Rather than each student paying a couple hundred dollars per book, each student in a group puts a certain amount (depending on the books needed by the group) into a pool of money that pays for the rental of the books required by the students of the group. Then, the books can be passed around among members of the group and returned by any member at any time on behalf of the group so no single student needs to be responsible for collecting all of the books in the end. So, realistically, how much do you think you, as a current or former, college student would be willing to pay for such a service (per quarter)?