Ms. Alvero is ordering copies of All Quiet on the Western Front for the literature class that she teaches....

Ms. Alvero is ordering copies of All Quiet on the Western Front for the literature class that she teaches. She can order hardcover copies for $18 each or paperback copies for $7 each. In all, she needs to order at least 32 copies of the book, and she has a budget of $300.
Which of the following combinations of hardcover and paperback copies can Ms. Alvero order?
9 hardcover copies and 23 paperback copies
7 hardcover copies and 24 paperback copies
7 hardcover copies and 25 paperback copies
6 hardcover copies and 26 paperback copies