Myth: Linux has a lower TCO Fact: If you consider that buying NT licenses for business use is tax-deductible,

Myth: Linux has a lower TCO

Fact: If you consider that buying NT licenses for business use is
tax-deductible, as are all those tech support calls, NT actually has a
lower TCO than Linux! How are you going to expense software that doesn't
cost anything? Eh?!?

-- From a LinuxToday post