Exhaust manifold replacement

I have the car listed above S. I think they exhaust manifold might be broken. About how much does it cost on average to have repaired at a shop? Also, if it is not the exhaust manifold, what else can it be? The car sounds loud and it sounds like it is coming from the front end of the vehicle and if I run the A/C I can smell exhaust fumes coming into the cab of the vehicle. I can also smell it if I am standing on the outside of the vehicle and the engine is running. Everything else seems to be running and acting normal. I just need to know how much it will cost, so that I can save up the money.