What am I missing?

[Viper1]

RolStoppable said:

Viper1 said:

[30.8m - (22m + 2.7m)] - 10% = 5.5 million units above NPD for PS3.

Looks like it's also 5 million above NPD for Wii software too. 61 m (VGC) vs 56m (NPD).

X360 seems almost exactly even.

 

EDIT:  Notice I said "above NPD" and not overtracked.  NPD and VGC are both extrapolated samples meaning neither is correct so one can't be over tracked or undertracked, it can only be under or above related to the other.

I think the numbers in the OP (61m for Wii, 30.8m for PS3, 36.6m for 360) are all before the additional 10 % for the rest of America are detucted. That would bring both, the Wii and 360, right in line with NPD numbers after detucting the 10 %, but the PS3 would still be about 4m higher than NPD after removing sales of bundles as well. So the PS3 software total is the only one being off.

Yeah, I noticed that after I posted.  I took off the 10% for PS3 and X360 but just completely forgot about it for Wii.   Spot on then aside from PS3 software being 5 million above NPD.