Blackjack book has me a bit confused...?

I recently bought The Blackjack Blue-book II after reading an interesting article about the Mentor count being better (yes, better) and easier to use than the Zen count. I quickly learned the values for the cards as it is a bit similar to the Zen count which I am familiar with. The real problem is that I don't understand the conversion of the running count to the true count for the Mentor count. If anyone can explain the way of doing this CLEARLY then that would be great.