No, your math is wrong. You forgot to add the pair of FirePro W9000 GPUs with 6GB each GDDR5 memory. I got the superdrive price from the option of a second superdrive from the Apple store.
I'm calling it Mac Tube Pro to easily distinguish it from a Mac Pro.
Probably an underclocked W9000 equivalent GPGPU, so don't expect Apple to be paying anywhere near the same price as the very much overpriced W9000 card. Apple probably negotiated some price well under a thousand each for the processor, in volume. The "Best" Mac Pro is going be just under $6K I suspect, which is about where the current dual processor model sits.
I suspect that we will see an underclocked W8000 GPGPU on a single CPU card for the iMac, again to get the volume higher and discounts from AMD.