i cracked my screen. how much does it cost to have it repaired by verizon?
Verizon won't repair it. You can have Apple repair it though or a company that specializes in phone repair. Guessing it will be around $100-$150.
Set an appt. with the Apple Genius Bar with the Apple Store app. It is $109 on the iPhone 6, which his not bad considering 3rd party repair facilities charge that much if not more. iPhone Screen Damage Repair - Apple Support
Excellent. Does that include tax and any extra fees?
My friend had his replaced recently and it was $109 plus tax, which matches the link above from Apple. So to answer your question it is $109 + tax.
With Apple replacing it at least you know your warranty is still intact...