This future contract pays 1 DKP for each 10,000 units of G.I. JOE: The Rise of the Cobra (Xbox 360) sold in the US in the retail month of August 2009 according to the NPD Group. This retail month runs from August 2, 2009 to August 29, 2009. This contract expires at 11:30 PM PST on September 10, 2009.