Facebook (Nasdaq: FB ) is taking this philosophy to a whole new level. The company raised $6.4 billion of cash after going public on Friday. Regulatory filings detailing its pro forma balance sheet shows Facebook now has $10.3 billion of total cash and cash equivalents. How does that stack up against Gates' principle? Accounting varies between companies, so it's hard to get an apples-to-apples comparison. But here goes: Facebook had total selling, general, and administrative expenses (SG&A) of $835 million in the 12 months ended March 31. With $10.3 billion of cash, that would pay its overhead expenses at headquarters for more than 12 years without a dime of revenue.