This future contract pays 1 DKP for each 10,000 units of The Legend of Zelda: Phantom Hourglass (DS) sold in the US in the retail month of September 2007 according to the NPD Group. This retail month runs from September 2, 2007 to October 6, 2007. This contract expires at 11:30 PM PST on October 17, 2007.