When Do You Make The Big Bucks?

Since the official release date of my book on July 6, the number one question I have been asked is,"When do you make the big bucks?"
In answer to that question, I was always taught that it wasn't polite to ask a person how much money they make.  Other questions I am continually asked to answer after a book-signing event are:Did you make a lot of money?How many books did you sell?Do you get paid to be a guest speaker?You have to pay for your own books?Since I've been your friend/family for "x...