Cat Back How Much Does It Cost To Fix Exhaust Cat Back?

How much does it cost to fix exhaust cat back? - cat back

Hello to all! I hope someone out there is an expert in the car ... I have a 1995 Plymouth Neon and the gas station told me that I adopted my cat exhaust. I would not know at first what it means, but secondly, I wonder if someone can tell me if you have to do or how much (approx) it cost!