I cracked my iTouch 4th gen screen how much does it cost to get it fixed?

Apple will exchange your iPod for a refurbished one for$99 for 8, 16 and 32 GB ones and $199 for 64 GB one.. They do not fix yours.

Apple - iPod Repair price

A third-party place like the following maybe less. Google for more.

iPhone Repair, Service & Parts: iPod Touch, iPad, MacBook Pro Screens

Replace the screen yourself

iPod Touch Repair – iFixit

http://www.amazon.com/Touch-Premium-Replacement-Screen-Repair/dp/B00823BZL0

$50.00 if you can do it yourself.