Vincent's bookstore is divided into different kinds of books. His top-selling books are fantasy books. He also sells literature books which cost half of the price of a fantasy book. If his fantasy books cost $4 each, and he sold five fantasy books and eight literature books per day, how much money will he earn after five days? Let's be accurate as possible.
Vincent earns $4 x 5 = $20 for selling 5 fantasy books per day. The price of the literature book is $4 / 2 = $2 each. He earns $2 x 8 = $16 per day for selling 8 literature books. So the total money he earns per day is $16 + $20 = $36. Therefore, he will earn $36 x 5 = $180 after 5 days.
The answer: 180.