Marco purchased a large box of comic books for $300. He gave his brother 15 comic books and sold the rest on the internet for $330, making a profit of $1.50 on each one. How many comic books were in the box? What was the original price of each comic book, assuming they all cost the same amount?

Answer 1

I answered this same question earlier

https://www.jiskha.com/questions/1829211/marco-purchased-a-large-box-of-comic-books-for-300-he-gave-15-of-the-comic-books-to-his