Cracked glass on just falling down

The full screen looks like it runs about a 100 bucks on the internet. I also see you can purchase the glass for about 15 bucks. Separating the glass from the screen can be quite a task, often special equipment is needed. I would check ifixit for a guide to see the difficulty of the repair. If you think you can do it knock it out! I would also compare the glass only repair to the full display repair to see if your comfortable doing one or the other. hope this helps!