The average number for a license agreement for an ebook is about the price of 1 book per 3 users.  Im surprised how uneven this ratio is even though the book no longer has to be produced.  I feel like publishers could incur a loss from ebooks, or maybe they dont. I want to know some sort of calculation for the loss or increase in profits by moving to ebooks.  There must be other costs that go into ebooks like software development and creating the transition from book to ebook, but how much compared to selling traditional books? I cant find anything good online.