I want to know the answer to the following question:
How much did Avicenna pay for the book that helped him understand the Aristotle text?
All the background I'm provided with is that "Forty times, it is said, he read through the Metaphysics of Aristotle, till the words were imprinted on his memory; but their meaning was hopelessly obscure, until one day they found illumination, from the little commentary by Farabi, which he bought at a bookstall for the small sum of three dirhams.". Is that enough to answer the question?
Answer: yes