how much does it cost to get your Apple iPhone 8plus replaced

Hello my name is Timothy I live in Longview Washington and I have a question regarding my apple IPhone 8plus and I just recently bought it and I have already cracked the screen we'll sort of the lcd does not work so there for the phone will not read my fingerprints and also the back part of the casing on the phone is popped out up towards the notification button I was wanting to know how much it would be to get it workerd on by Apple or how much it would cost to just get a replacement if you could please help me out that would be great again my name is Timothy thank you.