Simple Math Word Problem?

At first i overyzed this. All you have to do i believe ( i may be wrong) is add together the amount who know, generally, what an ollie is, what a rail slide is, and what a copper grind is, oh! plus the amound that know neither. You don't need to worry about how many know all three, or how many know two of the three since the original numbers encomp the amount of people who know of just the one move, the people who know that move and either of the other, and the people who know all three ( for example, if 410 spectators know what an ollie is, then naturally this would contain also the people who know what an ollie is AND a railslide or what an ollie is AND a copper grind, or who know all three .. get me?) So just add together 410, 462, 552 and 192. This should come out to be, if i calculated correctly, 1549. I may be wrong though. The one guy who answered before me seemed like they may know a little more about what theyre talking about though. =___="