How much did JK Rowling make per book?

Related questions

1. How did Newt Scamander die?
2. What books has JK Rowling published?
3. What does Harry Potter eat?
4. Did JK Rowling write Fantastic Beasts before Harry Potter?
5. What books other than Harry Potter did JK Rowling write?
6. Is JK Rowling writing more books?
7. Is JK Rowling writing Fantastic Beasts movies?
8. Is JK Rowling still writing Harry Potter?
9. Which author wrote the most books?
10. Does JK Rowling have other books besides Harry Potter?

Tags

1. #spinoffs
2. #assuming
3. #potter
4. #standard
5. #alone
6. #billion
7. #estimates
8. #adults
9. #sales
10. #books
11. #rowling
12. #earned
13. #harry
14. #several
15. #another
16. #royalty
17. #million