Thanks for the correction. You are correct!
7.2 billions flushed down the toilet by Steve Balmer I suppose
Nope, can't lay this rotten egg at Steve Balmer's feet. He resigned as CEO of Microsoft effective December 2013 and resigned from the Board of Directors in August 2014.
Microsoft announced the start of the Nokia acquisition in September of 2014. . . after Balmer was gone. Looks like he didn't want to have anything to do with it.
$10 billion is probably about right, now that I think about it.