Today's question comes from Otis, who asks about Facebook ads. How does he know how much he should spend each month? Otis's site is http://lakecitytactical.com/. Do you have a question about Facebook advertising? Record it at http://www.askpat.com/. Today's sponsor is Freshbooks. Go to http://www.freshbooks.com/askpat and enter "Ask Pat" for more information.