in Microsoft from 21 percent to around 14 percent by moving billions into his charitable foundation. Let's see what Bill Gates can do with his money in the following problems. Manhattan if the "current natives" want a 4 percent annual return on the original $24 purchase price? order to purchase Seattle in 11 years? purchase in 11 years? to $0 at the end of 45 years. How much can his annual withdrawal be in this case