It depends on if you sell the the rights to your book for a lump sum, or keep them yourself. The publishers can make up to 80% per book, but then have to pay to print/market/etc from that 80%. You may be lucky enough to get 10-15% for every book sold, but if you only sell a few you never make much. If you sell the rights for a lump sum, you may come out ahead, but the publisher loses money. Or you only get a small portion of what you could have, and the publisher's rolling in money. There is no way to know exactly how much every publisher makes.
It depends on how successful you are.
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as much money as he wants because he is a pimp.
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