<human>:  Thomas owns 200 books. He decides to sell them and use the money to buy records. Each book sells for $1.5. A record costs $3. If he buys 75 records, how much money does he have left over?
<bot>: How much money does he make selling the books? ** He makes $300 selling the books because 200 x 1.5 = <<200*1.5=300>>300
How much money does he spend on records? ** He spends $225 on records because 75 x 3 = <<75*3=225>>225
How much money does he have left? ** He has $75 left because 300 - 225 = <<300-225=75>>75
#### 75