A drawspace for the child-like imagination.
Hmm... I don't know what RDI or P&L are... but is this autobiographical? ;)
At least he has a good reason for doing this: the graphs!
P&L, profit and loss. No idea about ROI, but in any case I sympathize with Herbert.
Return On Investment, ROI. I don't know anything about it either. Can I borrow your tie, Herbert?