Lori Smith , Below are link to enable you to replace the screen yourself and where to purchase. If your model differs just do a google search for correct replacement display/digitizer assy. If you are not wanting to do the repair yourself, then $100 for replacement screen assy. installed/guaranteed is probably not a unreal estimate but you can always get a couple more estimates. Last link may be worth looking at as you may be eligible for one time free replacement screen from manufacturer.
Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
https://www.youtube.com/watch?v=Fd3AZSXh...
https://www.amazon.ca/Digitizer-Moto-XT1...
http://www.etradesupply.com/motorola/and...
http://www.androidauthority.com/moto-scr...
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