Nerval's Lobster writes "Microsoft has earned $853 million from sales of its Surface tablets, according to the company's annual Form 10-K filed with the SEC. That's a bit of a disaster, to put it bluntly. Earlier estimates put Surface sales at roughly 1.5 million units; the $853 million figure reinforces that projection. By comparison, Apple sold 14.6 million iPads in its last quarter alone. Adding insult to injury, Microsoft spent quite a bit producing and marketing Surface. The Windows division's 'cost of revenue increased $1.8 billion, reflecting a $1.6 billion increase in product costs associated with Surface and Windows 8, including a charge for Surface RT inventory adjustments of approximately $900 million,' read the Form 10-K. 'Sales and marketing expenses increased $1.0 billion or 34 percent, reflecting an $898 million increase in advertising costs associated primarily with Windows 8 and Surface.' Overall, Microsoft's Windows division earned $19.2 billion in its fiscal 2013."