I don't see a perhaps relevant number here. Going back to the original post, you'd (well, not YOU, you're not an idiot!) get $103 for installation of everything it takes to get one TV working, and $40 more per additional TV... how much is the client paying to Best Buy for this work?
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw