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It’s not much of a profit for Amazon on their $9.99 ebooks. See the full article here:

Picture 1.pngBernstein analysts Claudio Aspesi and Jeffrey Lindsay estimate that Jeff Bezos and company record an operating profit of 61 cents on each $9.99 e-book they sell. But a $24.95 hardcover generates $4.25 in operating profit. That’s a 7 to 1 ratio, and that can’t continue, indefinitely.
The good news: Aspesi and Lindsay argue that Bezos doesn’t have to raise his prices by that much to make his e-books much more profitable. Bumping up best-seller prices from $9.99 to $12.50 would boost his profits from 6 to 20 percent per book, they estimate. The flip side: Costs for the devices themselves will certainly go down.

 
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