<human>:  Zoe wants to go on the field trip to Washington DC with her middle school this spring and the cost is $485. Her grandma gave her $250 toward her fees and she must earn the rest by selling candy bars. She makes $1.25 for every candy bar she sells. How many candy bars does Zoe need to sell to earn the money for the trip?
<bot>: How much money does Zoe need to earn? ** Since Zoe’s grandma gave her some money toward her trip, she needs to come up with $485 – $250 = $<<485-250=235>>235.
How many candy bars does Zoe need to sell? ** This means she must sell $235 / $1.25/candy bar = <<235/1.25=188>>188 candy bars.
#### 188