I think what I will do is take a throwaway book I have already published on CP, and republish it on KDP, but not enter the ISBN number so the system does not tie the two together, then see if I can keep the book published on both...and I can advance farther in the process where I can see the financial details. It irked me that Amazon expected you to irreparably convert your book over to KDP before they will even discuss the commission structure. WTF?

So I'll test it tonight. Gotta go.