How much would my Iphone 4S cost to get fixed?

Yesterday at school my phone fell out of my pocket into the toilet and it was used the toilet and i didn't want to grab it and it was in the toilet for a good 2-3 minutes and when i grabbed it i was shaking and tried to turn it on but no response then it got Really hot and the led light turned on? Then the light turned off and the phone went back to normal tempreture and i put it in a bowl of rice overnight now its been 24 hours and before i took it out and plugged it into the computer and itunes but no response and it didn't detect it… I'm really upset i've been none stop crying i hadnt backed it up! I have an appointment with apple tonight. But do you think my phone is dead? Even when i switch the silent button it doesn't vibrate… I've still got 15 months on my plan! How much would it cost to fix?

Sorry Kiddo.
Apple's warranty is voided with water damage, so they can't help and if a piece of technology gets wet and rice didn't help, it's a gonner.
The best thing you can do in the meantime, do you have insurance on your phone? Utilize that. If not, use an old phone or a parent's old phone to hold you over. You can also ask friends who use the same carrier as you and buy a phone from them.

Just send it to the manufacture to fix it if they ask what happene say other reason don't tell water damage or fix with other store