Earlier this month Microsoft took a huge $900 million write-down on Surface RT inventory and a couple of days ago CEO Steve Ballmer confirmed what we all knew – Microsoft simply built way too many Surface tablets.

It gets worse, much worse.

In its annual report to the US Securities and Exchange commission Microsoft reported total surface revenue for fiscal 2013 of just $853 million, reports The Register. Redmond’s fiscal year ended June 30.

That practically means it ended the year with more tablets in inventory than it managed to sell. Furthermore the $853 million includes sales of the Surface Pro. We can only guesstimate the actual unit sales, but given the Surface RT and Pro pricing, it turns out we are looking at less than three million units.

The Surface RT is a lemon, we all knew it and now it is official.