How much does it cost to fix a cracked iphone screen?

My iphone 4s has a scratch on it and its starting to bother me. How much would it cost to get it fixed

For $200 they should replace the whole phone and give you a knew one. O

The back of the ilac centre is only 10 euro (Dublin, ireland

It depends. If you only replace the screen, that would be cheap, if you replace the whole lcd screen assembly, it would be a little bit expensive around $50, you can see here