Question

Tim is opening up a bookstore, where he sells both new and old books. He Charges $11.50 for a new book, and $4.50 for an old book. What was Tim's revenue last month if he sold 15 new books and 12 old ?

Answer 1

11.5(15)+4.5(12)
=172.5+54
=$226.5

Answer 2

11.50 times 15 is equal to 172.50.
4.50 times 12 is equal to 54.
172.5 plus 54 is equal to 226.50.
I believe $226.50 is the revenue.