Q: My mother celebrated her birthday with a total of 60 guests. Half of the guests are women, 15 are men, and the rest are children. In the middle of the celebration, 1/3 of the men and 5 children left. How many people stayed and enjoyed the birthday celebration?
A: There were 60 guests / 2 = 30 women at my mother's birthday celebration. There were 30 women + 15 men = 45 men and women. So, 60 people - 45 men and women = 15 were children. Then, 15 men / 3 = 5 men left. Thus, 5 men + 5 children = 10 people left. Therefore, 60 people - 10 people = 50 people stayed and enjoyed the birthday celebration. The answer is 50.
Question: A library has a collection of 100 historical novels arranged on a shelf. 5 people borrow 2 books each from the shelf on a particular day, and 20 more books are borrowed from the shelf on the second day. How many books are remaining on the shelf after the second day?
Answer: Five people borrowed 5 people * 2 books / person = 10 books on the first day. After the second day, the total number of borrowed books increased to 10 books + 20 books = 30 books. The total number of books on the shelf after the second day is 100 books - 30 books = 70 books. The answer is 70.
[Question]Jason sent 220 text messages on Monday, half as many text messages on Tuesday, and 50 text messages each day Wednesday through Friday. How many text messages did he send on average during those five days?
[Answer]First find how many text messages he sent on Tuesday: 220 messages / 2 = 110 messages. Then find how many text messages he sent Wednesday - Friday: 50 messages / day * 3 days = 150 messages. Then add up all the messages he sent to find the total: 110 messages + 150 messages + 220 messages = 480 messages. Then divide that number by the number of days to find the average number of messages he sent per day: 480 messages / 5 days = 96 messages / day. The answer is 96.
Q: Farmer Brown fed 7 chickens and 5 sheep. How many total legs were there among the animals he fed?
A: The chickens had 7 * 2 = 14 legs. The sheep had 5 * 4 = 20 legs. There were 14 + 20 = 34 legs. The answer is 34.
Question: It's field trip month, and the students took six vans and four minibusses. There were 10 students on each van and 24 students on each minibus. How many students went on the field trip?
Answer: The total number of students who took the van is 6 x 10 = 60. The total number of students who took the minibus is 4 x 24 = 96. Therefore, 60 + 96 = 156 students went on the field trip. The answer is 156.
Q: Megan works eight hours a day and earns $7.50 per hour. If she works 20 days a month, how much will be her total earnings for two months of work?
A:

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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In a day, Megan earns 8 x $7.50 = $60. In a month, she will be earning 20 x $60 = $1200. Therefore, Megan will earn a total of 2 x $1200 = $2400 for two months of work. The answer is 2400.