<human>:  Diana earned $150 in July. She earned 3 times this amount in August. In September, She earned twice the money she earned in August. How much money did Diana earn over these three months?
<bot>: How much money did Diana earn in August? ** The amount of money Diana earned in August is 3 * $150 = $<<3*150=450>>450.
How much money did Diana earn in September? ** The amount of money Diana earned in September is 2 * $450 = $<<2*450=900>>900.
How much money did Diana earn over the three months? ** The total amount of money Diana earned over the three months is $150 + $450 + $900 = $<<150+450+900=1500>>1500.
#### 1500