How do I convince my employer to buy me a supercomputer?

I don't want to own an old and busted supercomputer either. I want a Cray XC30. I'm done some research, and it seems that a good price would be $20,000,000. Now, I know it's going to be hard to convince them to sign for that, but I've compiled a document detailing the benefits. Firstly, all my programs would compile almost instantly. I estimate that it takes almost ten minutes for the current build server to recompile my team's project from scratch. That means my entire team suffers a collective hour each time that happens. I estimate that that means a loss of $23482346 per year to company productivity. Additionally, it would be good for morale, which I estimate to improve productivity by 12512%. Finally, compared to the cost of per-seat license that they are already paying for, it's change to them.

What examples have I missed? Please help me /prog/. If I get my requisition order approved, I promise that I will give you all shell accounts on it to access during non-work hours.

>>16
And how often do you change the class signatures of code that's already written and already mature as opposed to subclassing that code and overriding the old behavior?