Just new chain or New sprockets also..

[ImmaSquashYou]

Hey guys,

So i notice that i need a new chain. But the thing is, my chain is stretched more on some parts than it is on others. So its making me have that chugging motion when i'm riding. I'm pretty sure that its the chain since for the most part, the chain is tight when i'm rolling the bike. But for about 6 inches of the chain, it gets really loose. So i'm wondering if its just the chain or the sprockets also.

How much am i looking at here?? $150 for the chain and sprocket and possibly $100 for labor???? I'm sure you guys have your chain and sprocket's changed...is it hard to do yourself?? I don't have stands tho. Thanks a bunch!!!