Q: Amber buys 7 guppies for her pond. Several days later, she sees 3 dozen baby guppies swimming around. Two days after that, she sees 9 more baby guppies. How many guppies does she have now?
A: 3 dozen baby guppies make 3 x 12 = 36 baby guppies. There are a total of 36 + 9 = 45 baby guppies. Adding the adult guppies, there are 7 + 45 = 52 guppies. The answer is 52.

Q: Jangshe spent $610 on 7 pieces of clothing. One piece was $49 and another piece was $81. If the other pieces were all the same price, how many dollars was one of the other pieces?
A: 610 - 49 = 561, and then 561 - 81 = 480. There were 7 - 2 = 5 other pieces. 480 / 5 = 96 dollars. The other 5 pieces cost $96 each. The answer is 96.

Q: James is a first-year student at a University in Chicago. He has a budget of $1000 per semester. He spends 30% of his money on food, 15% on accommodation, 25% on entertainment, and the rest on coursework materials. How much money does he spend on coursework materials?
A:
Accommodation is 15% * $1000 = $150. Food is 30% * $1000 = $300. Entertainment is 25% * $1000 = $250. Coursework materials are thus $1000 - ($150 + $300 + $250) = $300. The answer is 300.