Apple care will charge around $200.
You can get it fixed in any store that repairs ipods and iphones.
The cost to fix a broken screen of a iphone is usually between 100 and 200 for parts and labor.
Most cell phone repair shops can do this front panel replacement,
but make sure they put genuine apple,
or Nokia parts in it so that,
if you`re still under warranty,
you will not void it.
The better option is to approach the dealer rather than an ordinary store dealer who may not fix the original parts which later may cause trouble for you.