This is typical. Must not have actually shelled out the money to BUY windows. it is easy to built a PC with $50 MB, $75 video card, $40 case to screw it all in to, $70 hd etc. Apples to oranges you are trying to compare here.
Windows only costs $250 ish for Home Premium, to be honest if you are a student you can get a copy for free, if you work for a employer who is part of the Microsoft Software Exchange you can get a copy for free, and if you wanted to shell out a hundred or something dollars a year you could become part of the MSDN network you get copies for free.
The really funny part is, that millions of people continue to run illegal copies of software made by Microsoft, yet they continue to make billions while Apple sits and continues to make ridiculously childish commercials that still make little to no sense to millions of people who actually understand how to use a Windows operated computer.