[Question]Jack bought 3 books a month at $20 each. He sells them back at the end of the year for $500. How much money did he lose?
[Answer]He bought 3 * 20 = $60 of books a month. That means he bought 60 * 12 = $720 of books a year. So he lost 720 - 500 = $220. The answer is 220.
Q: James decides to replace his car. He sold his $20,000 car for 80% of its value and then was able to haggle to buy a $30,000 sticker price car for 90% of its value. How much was he out of pocket?
A: He sold his car for 20000 * .8 = $16,000. He bought the new car for 30,000 * .9 = $27,000. That means he was out of pocket 27,000 - 16,000 = $11,000. The answer is 11000.
Question: Annie has some money. The restaurant next door sells hamburgers for $4 each. The restaurant across the street sells milkshakes for $5 each. Annie buys 8 hamburgers and 6 milkshakes. She has $70 left. How much money, in dollars, did Annie have at first?
Answer: Annie spends 4 * 8 = 32 dollars on hamburgers. Annie spends 5 * 6 = 30 dollars on milkshakes. Annie spends 32 + 30 = 62 dollars on hamburgers and milkshakes. Annie had 62 + 70 = 132 dollars at first. The answer is 132.
[Question]A man is trying to maximize the amount of money he saves each month. In particular, he is trying to decide between two different apartments. The first apartment costs $800 per month in rent and will cost an additional $260 per month in utilities. The second apartment costs $900 per month and will cost an additional $200 per month in utilities. The first apartment is slightly further from the man's work, and the man would have to drive 31 miles per day to get to work. The second apartment is closer, and the man would only have to drive 21 miles to get to work. According to the IRS, each mile a person drives has an average cost of 58 cents. If the man must drive to work 20 days each month, what is the difference between the total monthly costs of these two apartments after factoring in utility and driving-related costs (to the nearest whole dollar)?
[Answer]The mileage cost for the first apartment will be 31 * 20 * 0.58 = $359.60. This makes the total monthly cost of the first apartment 359.60 + 800 + 260 = $1419.60. Similarly, the mileage cost for the second apartment will be 21 * 20 * 0.58 = $243.60. Thus, the total monthly cost of the second apartment is 243.60 + 900 + 200 = 1343.60. Therefore, the difference in total monthly costs is 1419.60 - 1343.60 = $76. The answer is 76.
Q: Linda bought two coloring books at $4 each, 4 packs of peanuts at $1.50 each pack, and one stuffed animal. She gave the cashier $25 and got no change. How much does a stuffed animal cost?
A: The two coloring books amount to 2 x $4 = $8. The 4 packs of peanuts amount to 4 x $1.50 = $6. The total cost for the coloring books and peanuts is $8 + $6 = $14. Thus, the stuffed animal cost $25 - $14 = $11. The answer is 11.
Question: Tony puts $1,000 in a savings account for 1 year. It earns 20% interest. He then takes out half the money to buy a new TV. The next year, the remaining money earns 15% interest. How much is now in the account?
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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After one year he earns $200 in interest because 1,000 x .2 = 200. After one year it has $1,200 in the account because 1,000 + 200 = 1,200. He takes out $600 because 1,200 / 2 = 600. After this it has $600 in it because 1,200 - 600 = 600. She earns $90 in interest because 600 x .15 = 90. The account now has $690 because 600 + 90 = 690. The answer is 690.