4. The U ofA Bookstore offers a program of reproducing class notes for participating professors.

Professor Yataha teaches a freshmen-level class, where an enrollment of between 200 and 250 students, uniformly distributed, is expected. It costs the bookstore $10 to produce each copy, which it then sells to the students for $25 a copy. The students purchase their books at the start of the semester. Any unsold copies of Professor Yataha's notes are shredded for recycling. In the meantime, once the bookstore runs out of copies, no additional copies are printed, and the students are responsible for securing the notes from other sources. If the bookstore wants to maximize its revenues, how many copies should it print?