IPhone 4 screen repair price?

How much would a screen repair cost for normal iPhone 4
The bottom half of the screen is badly cracked
The top half has like 7 cracks
But the screen does not work the image still appears when it's turned on but you can't unlock the phone or use the screen
How much would it be to get it fixed in Australian currency and what shops will fix it like Telstra or all phones those kind of shops

You can replace it yourself for way cheaper.
You can buy the glass on eBay(or another site) and just watch a video on YouTube on how to replace it. It's really simple.
Otherwise, if you rather get it replaced by someone else, I know that Radio Shack replaces it for around 40 maybe 50 bucks.

Replace it yourself. Just search online how to do it. It's really not hard, I'm 13 and I've done it for my friend.