Thanks for the credits :)

And for PS4 software unit sales, 881.1m sold is WITHOUT FY2013 (from PS4 launch to end of March 2014) and WITHOUT FY2014 (April 2014 - March 2015)

But we know that as of 4th Jan 2015 (almost end of FY2014), there were 81.8m units sold-through (therefore much more sold [=shipments+digital sales])

So for PS4, it's a minimum of 881.1 + 81.8 = 962,9m sold

Impossible to prove. Whenever Nintendo has had a very unsuccessful console, they had a handheld doing very well and making lots of money. It has covered up the detrimental impact of the console. Even the PSP to a degree made PS3 look better than it was.

Actually not at all for Nintendo. Because even in their worst hour, they never stopped giving numbers. So if you crunch in the numbers for all of the 3ds hardware and software and take them out of the equation plus the other stuff ninty spent money on, you can tell how much of it the Wii U was eating up. And have you seen the charts of Sony when PS3 was selling Vs now? And the same for Ninty with Wii U. Ninty was always close to 0 with little losses while Sony's gap was huge. Ninty are just better at managing their business when their consoles fail than Sony are, which is why we're lucky they are so good at marketing their consoles. Otherwise PS and possibly Sony would die out. If you want to actually dig deep, it is not only possible but also probable that you can prove or disprove my hypothesis.

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Quick, someone give @Eagle367 a sedagive!!!

When PS3 costed (lost) 200 per console, selling 80+M will be a much bigger loss than the 15M sold by WiiU.

Still, people will have a lot of good games and follow through to PS4 because of it, while WiiU wants to be forgotten.