How much would it cost to fix my broken iPhone 5 screen?

So a couple of months ago, friend dropped my friend dropped my iPhone 5.It isn't that bad. The side it broke on was the back side. Where its like a mirror (next to the camera) and i was wondering how much itll cost to get it repaired. I have warranty for apple.
heres a picture of the crack (there's a thin line where it's scratched and another one that's cracked)

Game from my IPad to my IPhone?

Have an iPad and i'm planning to buy an iPhone and gift my iPad to someone. I have a game in my iPad"clash of clans". How to transfer all my game data to my iPhone. Do i need to start the game from beginning.

Update to OSX Mountain Lion?

Hi! So I got my hands on an iPhone 5 recently and I wanted to back it up and add songs so I plugged it into my Mac. Then it said that my iTunes version was too old and to update, i need to update the OSX since I'm currently running on 10.5.8. I'm considering buying Mountain Lion but will it DELETE MY FILES? Read some stuff online about "backing it up"? How do you do that exactly, without iCloud?

I got a reward, should I file income tax return?

I got a total of $1, 134 rewards in 2012 from AppTrailers (iPhone app). Now I don't know if I should pay taxes. I'm single, dependent, living in California. I submitted them a W-9 because they asked for it since I earned more the $600, and so I did. They said that this is a source of income, but they call it "rewards".So, should I file income tax return? If so, this would be my first time. What are the consequences if I didn't file this when I have to just in case?

IPhone more code instant messenger app?

Is there any more code messenger app in the App Store? It would be cool to chat using it. All the apps I saw are to teach mors code but non to use it so far. My friend and I both have iPhones please inform me if you know an existing instant messenger using morse code or anything similar that's awesome.

Iphone5 and adobe flash player?

How in the h3ll is it that out of all the phones on the market I'm talking about the new ones and a few old ones is it that the iPhones don't have adobe flash player I can't watch nonthing online while I'm at school (not doing classes doing lunch) or somewhere boreing I can't do anything and it gets boreing steady playing games is anyone else mad about this I mean they could at least sell a app for it I would buy it no problem but to many sites require adobe flash player plugin