How much does your virtual environment cost?

Most companies are implementing some sort of virtualization today, but how much does that virtualed server cost? If you have 300 virtual machines, how much does that test/dev system cost? Or that font-end web server? And more importantly — How much would it cost to move that to a public cloud?

The Accelerating the Journey to Your Cloud keynote at EMCworld today touched on this subject. How much are you paying for each VM over a 3 year period? Is that VM really that important? Should you restructure your virtual environment to be more cost-competitive with public cloud providers?

I for one am going to do some number crunching when I get back to the office to see how much we are costing, which systems/environments cost the most, and where we can streamline our environments.