[Question]Melinda is taking a 1200-mile trip with her family to visit their cousins. How much time will they save if they drive 60 miles an hour instead of 50 miles an hour?
[Answer]Going 60 mph, the trip would take 1200 - mile trip / 60 miles an hour = 20 hours. Going 50 mph, the trip would take 1200 - mile trip / 50 miles an hour = 24 hours. Melinda’s family would save 24 – 20 = 4 hours. The answer is 4.
Q: If Billy sleeps 6 hours one night, then 2 more hours than that the following night, and then half the previous amount the following night, and then finally triple the previous amount the final night, how much did he sleep in that four day period?
A: Billy slept 6 hours the first night. He then slept 6 + 2 = 8 hours the second night. Billy then slept 8 / 2 = 4 hours the third night. Finally, Billy slept 4 * 3 = 12 hours the fourth night. In total, Billy slept 6 + 8 + 4 + 12 = 30 hours. The answer is 30.
Question: In one of the teacher's meetings, it was agreed that each class will contribute $90 for a school activity. The class of Miss Evans has $14 class funds and they decided to use it to lessen the contribution of each student. If the remaining amount will be divided among 19 students, how much will each student contribute?
Answer: The 19 students will divide equally the remaining $90 - $14 = $76. So, each student will contribute $76 / 19 students = $4 / student. The answer is 4.
[Question]James decides to start making his own coffee. He buys a coffee machine for $200 and gets a $20 discount. He figures it will cost him $3 a day to make his coffee. He previously bought 2 coffees a day for $4 each.  How long until the machine pays for itself?
[Answer]He bought the machine for $200 - $20 = $180. He used to spend 4 * 2 = $8 a day. So he saves $8 - $3 = $5 a day. So it will take him $180 / $5 = 36 days to pay for itself. The answer is 36.
Q: Scott wants to buy a skateboard. To make money, Scott sold berry smoothies for $3 a cup and cakes for $2 each. He sold 40 cups of smoothies and 18 cakes. How much money did he make?
A: He made $3 / cup × 40 cups = $120 from the smoothies. He also made $2 / cake × 18 cakes = $36 from the cakes. Scott made a total of $120 + $36 = $156. The answer is 156.
Question: Annie spends 2 hours a week on chess club, 8 hours a week on drama club, and 3 hours a week on glee club. If there are 12 weeks in each semester and Annie takes the first two weeks off sick, how many hours of extracurriculars does she do before midterms?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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First find the total number of extracurricular hours Annie does per week: 2 hours / week + 8 hours / week + 3 hours / week = 13 hours / week. Then find the number of weeks in a semester before midterms by dividing the total number of weeks by 2: 12 weeks / semester / 2 = 6 weeks / semester. Then find the number of weeks before midterms that Annie wasn't sick: 6 weeks - 2 weeks = 4 weeks. Then multiply Annie's weekly commitment by the number of weeks to find her total number of extracurricular hours: 13 hours / week * 4 weeks = 52 hours. The answer is 52.