At a used book sale, Miss Chen bought a box of 20 assorted books for $40. What was the cost per book?
To find the cost per book, we need to divide the total cost by the number of books.
$40 / 20 books = $2 per book
So, the cost per book is $2.
$40 / 20 books = $2 per book
So, the cost per book is $2.