Suppose During the annual book fair, an author sold 200 copies of his latest novel for $15 each. The total sales amounted to $3000. The author also had 50 copies of his previous book on clearance, which were sold for $5 each. What was the total profit made by the author during the book fair?
Can we infer that "The author sold all 50 copies of his previous book."? Yes, no, or maybe?