"If a typical textbook costs $100 and has a five-year replacement cycle, now you’re buying a new open text and telling them they can highlight it and mark in it and do whatever they want. The price has to be less than $20 a book for that to work out. So some chemistry teachers took this 1,400-page chemistry book and turned it into a 250 -age book that covers what they want it to, and they’ve read every single word. On a short print run, including shipping, the books cost $7.30."
