Predict: Last 4 months sales of Big 3 for 2009 and total 2009 sales.

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Last 4 months of 2008 sales:
Wii ~ 12.5 million  (Total 2008 Wii sales around 24 million)
XBox 360 ~ 6.5 million  (Total 2008 XBox 360 sales around 11 million)
PS3 ~ 4.5 million  (Total 2008 PS3 sales around 10 million)

Last 4 months of 2009 sales predictions:
Wii ~ 10 million (Total 2009 Wii sales around 19 million)
PS3 ~ 8 million (Total 2009 PS3 sales around 12 million)
XBox 360 ~ 6 million (Total  2009 X360 sales around 10 million)

Last 4 months accounts for  up to 50% of the total  yearly sales. PS3 price cut will result in increased sales for last 4 months.