Human: James gets 10 new CDs. Each CD cost $15. He gets them for 40% off. He decides he doesn't like 5 of them and sells them for 40. How much money was he out? Assistant: 
How much did James get a discount on each CD? ** He got a 15*.4=$<<15*.4=6>>6 discount on each CD
How much did each CD cost? ** That means each CD cost 15-6=$<<15-6=9>>9
How much did James pay? ** So he paid 10*9=$<<10*9=90>>90
How much money was he out? ** That means he was out 90-40=$<<90-40=50>>50
#### 50