Theresa bought 5 karaoke CDs on sale. A karaoke CD normally costs $24, but she was able to purchase the CDs for $22.50 each. How much money did Theresa save on her entire purchase?
Subtract the sale price from the regular price: $24.00 – $22.50 = $1.50. Multiply the remainder by the number of CDs to get your answer: $1.50 × 5 = $7.50.