Question

A book store sells books for $4 each. When a customer purchases 2 books they receive 1 additional book for half-price . Anna bought just enough books to receive 3 half-price books. How much money did Anna spend?

Answer 1

3 at $2 + 6 at $4

6 + 24

30

Answer 2

6 @ $4 = $24

3 @ $2 = $6

24 + 6 = ?