Respuesta :
Assuming each book costs the same amount they would each cost $20
Answer:
$20
Step-by-step explanation:
1. find cost of all books (total $ - leftover $): $136 - $16 = $120
2. find cost of each book (total cost of all books / number of books): $120 / 6 books = $20 / 1 book
One book costed 20 dollars