Thanks for the useful advice - sorry for my writing - I was a little rattled.
After all- this is my first business deal - ever. And it was with my first boss - ever.
After sleeping on it - I am defiantly getting screwed. I'm really not being aggressive on my B estimate. I think c is the only option.
The current plan of attack - 1- talk to the best lawyer I can find / afford 2- pull together all relevant business information and arrange it in a way others can understand 3- find a bigger fish 4- crush them