Complex sentence: Inmates must pay 5 cents per minute for use of this system, and are permitted to print messages at a cost of $0.15 per page; in many U.S. federal prisons inmates wages start at 12 cents per hour.
Split into simpler sentences: Inmates must pay 5 cents per minute for use of this system. In many U.S. federal prisons inmates wages start at 12 cents per hour.