Building an amplifier with Amplimo

I just built an amplifier using the Amplimo modules and a Plitron transformer. I used an existing chassis to install the modules and followed the directions on the Plitron site. It doesn't get much simpler. The amp is working very well and the sound is excellent.
How much has the amp cost to build?
I build equipment also and tweak off the shelf. It is a great hobby. congrats
It was roughly $400.