Microsoft filing shows just $853 million in Surface revenue following $900 million RT inventory charge

Ballmer and Co. have been tight lipped when it comes to Surface sales figures, but they've just opened up a little to Uncle Sam. An SEC filing reveals that the first-party tablet raked in a total of $853 million in revenue between its debut and June 30th, the end of the firm's fiscal year. To put that in perspective, the cash Microsoft managed to rake in is eclipsed by a $900 million hit it took through Surface RT inventory adjustments. To make matters worse, the company spent more on advertisin...