A good rule of thumb is multiply the number of people on the team by $10k to get the monthly burn. That is not the number you pay an employee. That is the "fully burdended" cost of a person including rent and other related costs.
(Full Post: http://www.avc.com/a_vc/2011/12/burn-rates-how-much.html )
Fred Wilson has been a venture capitalist since 1987. He currently is a managing partner at Union Square Ventures and also founded Flatiron Partners. Fred has a Bachelors degree in Mechanical Engineering from MIT and an MBA from The Wharton School of Business at the University of Pennsylvania. Fred is married with three kids and lives in New York City.