[Question]Alberto spent $2457 on a new engine for his car. Samara spent $25 on oil, $467 on tires and $79 on detailing for her car. How many more dollars did Alberto spend on his car?
[Answer]Samara = 25 + 467 + 79 = $571. 2457 - 571 = $1886. Alberto spent $1886 more on his car. The answer is 1886.

[Question]Carolyn is planning out her final essay. The introduction will be 450 words, the conclusion will be triple the length of the introduction, and each of the four body sections will be the same length. If her essay has to be 5000 words total, how long is each section?
[Answer]First find the length of the conclusion by tripling the length of the introduction: 450 words * 3 = 1350 words. Then subtract the length of the introduction and conclusion from the total length to find the combined length of the body sections: 5000 words - 1350 words - 450 words = 3200 words. Then divide the combined length of the body section by the number of body sections to find the length of each section: 3200 words / 4 sections = 800 words / section. The answer is 800.

[Question]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?
[Answer]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]Krystian works in the library. He borrows an average of 40 books every day. Every Friday, his number of borrowed books is about 40% higher than the daily average. How many books does he borrow in a week if the library is open from Monday to Friday?
[Answer]
The number of books borrowed on Friday is higher by 40 * 40 / 100 = 16 books. There are 5 days from Monday to Friday inclusive, so Krystian borrows an average of 5 * 40 = 200 books during that time. With Friday's increase in borrowings, during one week Krystian borrows 200 + 16 = 216 books. The answer is 216.