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?
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
To find the number of comic books in the box, we need to divide the profit that Marco made by the profit per comic book. Let's calculate it step by step:
1. First, let's find the profit Marco made from selling the comic books. He sold them for a total of $330, and each comic book had a profit of $1.50. So, the number of comic books he sold is $330 / $1.50 = 220.
2. Marco initially gave his brother 15 comic books, so to find the total number of comic books in the box, we need to add the 15 he gave away. The total number of comic books is 220 + 15 = 235.
Therefore, there were 235 comic books in the box.
Now, let's find the original price of each comic book.
3. We know that Marco purchased the large box of comic books for $300. To find the original price of each comic book, we need to divide the total cost by the number of comic books. The original price of each comic book is $300 / 235 = $1.28 (rounded to two decimal places).
Therefore, the original price of each comic book was $1.28.