Originally Posted by DiapDealer
has a "split" feature that can separate Kindlegen output into its constituent parts (MOBI/KF8). I suggest using it to get a ballpark idea of the size of the different files that are ultimately going to be delivered to the customer ... which is what I believe the per MB fee is based on. I'm sure someone will correct me if I'm full of it.
It does. The newest version of KindleGen also gives an "estimated" file size for both versions at the end.