How much will it cost if i get my completely broken iphone repaired?

I cracked my phone but it worked perfectly, i bought a replacement lcd glass for the front and messed up all the screws and lost some of them around my house, it won't turn on even if i try to put it in dfu mode and when i plug it in to the charger it has the connect to itunes symbol. I tried to restore it but it won't go through all the way and it blinks on but it turns back off instantly.i've tried everything to fix it myself so i think i need to go get it repaired. If i give them the lcd replacement glass how much will it cost to get the phone repaired?

No one can answer that question without examining it in person.

Take it to the Apple store, for a Free estimate. A lot of things are cheaper to replace than fix, now a days

It costs a lot! I would say just sell it at http://www.cashiphone.com
They have great service, and you can get a great deal from them.
Highly recommended to sell your iphone to them.