[Question]On Mary's birthday, her brother surprised her with $100. She spent a quarter of it on a new video game and then used a fifth of what was left on swimming goggles. How much money did she have left?
[Answer]Mary spent 100 / 4 = 25 dollars on a new video game. So, after the video game purchase, Mary was left with 100 - 25 = 75 dollars. Mary then bought swimming goggles for 75 / 5 = 15 dollars. Mary had 75 - 15 = 60 dollars left. The answer is 60.

[Question]During April, the baker sold 453 cakes at $12 and 126 pies at $7. How much did the baker earn?
[Answer]The baker sold cakes for 453 * 12 = $5436. And pies for 126 * 7 = $882. In total the baker earned 5436 + 882 = $6318. The answer is 6318.

[Question]Alexander is going food shopping. If he buys 5 apples for $1 each and 2 oranges for $2 each, how much does he spend?
[Answer]Alexander spends 5 * $1 = $5 on apples. He spends 2 * $2 = $4 on oranges. In total, he spends $5 + $4 = $9. The answer is 9.

[Question]Sarah decided to pull weeds from her garden. On Tuesday she pulled 25 weeds. The next day she pulled three times the number of weeds she did the day before. On Thursday her allergies bothered her and she could only pull up one-fifth of the weeds she pulled on the day before. Finally, on Friday it rained for half the day and she managed to pull up 10 fewer weeds than she did on Thursday. In total, how many weeds did she pull up?
[Answer]
On Wednesday she pulled 25 * 3 = 75 weeds. On Thursday she pulled 75 / 5 = 15 weeds. On Friday she pulled 15 - 10 = 5 weeds. In total she pulled 25 + 75 + 15 + 5 = 120 weeds. The answer is 120.