By this point, Randy Pease knows the numbers by heart.Forty-seven percent of the people who download a so-called "free-mium" game for their mobile device will end up spending a little cash to help themselves progress more quickly through the game.And among those folks who have more money than time, women will spend an average of $111 and men will spend an average of $74 an average purchase of $94, given that women account for slightly more than half of those who spend money on free-mium games.Take that figure, Pease says, and multiply by it by the million or so mobile …