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? Think carefully first, then make a decision:
Since Zoe's grandma gave her some money toward her trip, she needs to come up with $485 $250 = $235. This means she must sell $235 / $1.25 / candy bar = 188 candy bars. So, the answer is 188.