What's the average cost per year of employing an average Office worker? $50.000? What's the cost per year of buying a copy of Office? (I'm still on Office 2007

What's the average cost per year of employing an average Office worker? $50.000? What's the cost per year of buying a copy of Office? (I'm still on Office 2007 and it's 2014...) People whose time is worth so little that they can't afford to update Office can spend time on workarounds instead.