Cracked iphone 4s Screen-had for 3 months

I recently cracked my iphone 4s front screen, as it fell out of my hand onto cement. I had a case on it, and a screen protector, but the top left corner on the front is all cracked still. I've had my iphone for about 3 months, give or take, and did not purchase apple care. I actually hadn't even known about it until i purchased my new macbook last week. Will apple replace my screen and or phone? and how much will it cost? I am in U.S. if it matters. Thanks