How much would it cost to get my iphone 4s screem repaired?

Its not that bad but still i don't like stuff broken so how much would it cost to repair it

i live in edmonton and i'm 13 and i can't let my parents find out

i would like to get my phone repaired at londondarry mall but i don't know if they have a store there

Most places will charge you about $90 bucks unless you by the pieces and do it your self for about $20