Well, you must learn some basic debugging skills; asking about every obvious error in your code in a forum isn't sustainable. Or, if you're not a developer and you're not willing to learn such skills, hire a developer to do it for you.
You see in the editor where exactly you have the bug: in resp.SalesTable. And in the error, you see a detailed explanation of the problem. It says that System.Array doesn't have any property called SalesTable, which is obviously true. That's why your code doesn't compile.
Again, IntelliSense shows you available methods, so you can easily avoid such mistakes even before compilation. Also, you can access array elements by index (look into Arrays (C# Programming Guide) to learn basics).