Answer the following question.
Tas and his friends put up a t-shirt for sale. They ended up selling 200 t-shirts in 25 minutes. Half of the shirts were black and cost $30, while the other half were white and cost $25. How much money did they make per minute during the sale?
Step-by-step reasoning process: The total revenue from black shirts was 100 * $30 = $3000. The total revenue from white shirts was 100 * $25 = $2500. The total revenue from all shirts sold was $3000 + $2500 = $5500. Tas and his friends ended up making $5500 / 25 minutes = $220 per minute.
The answer is 220.

Answer the following question.
Cameron is printing her thesis in the school library and has 400 A4 pieces of paper. If 40% of the papers did not print out up to her desired quality and she separated them as invalid, calculate the total number of valid documents.
Step-by-step reasoning process: If she had 400 papers, the total number of documents she separated as invalid is 40 / 100 * 400 pages = 160 pages. The number of valid documents is 400 pages - 160 pages = 240 pages.
The answer is 240.

Answer the following question.
Maya's organization hosted a weekly farmers' market to raise money for the church choir. They sold broccolis, carrots, spinach, and cauliflowers. After adding together all of their earnings, Maya found out that they had made $380. The organization made $57 from broccoli and the sales of the carrots are twice as much as the sales of broccoli. Then, their sales for the spinach is $16 more than half of the sales of carrots. How much did they make from cauliflower sales?
Step-by-step reasoning process: The sales of the carrot is 57 x 2 = $114. Half the sales of carrot is $114 / 2 = $57. So, the sales of the spinach is $57 + $16 = 73. The total sales of the broccolis, carrots, spinach is $57 + $114 + $73 = $244. They made $380 - $244 = $136 from cauliflower sales.
The answer is 136.

Answer the following question.
On each of 7 Mondays, it rained 1.5 centimeters. On each of 9 Tuesdays it rained 2.5 centimeters. How many more centimeters did it rain on Tuesdays than Mondays?
Step-by-step reasoning process: Mondays: 7 * 1.5 = 10.5. Tuesdays: 9 * 2.5 = 22.5. 22.5 - 10.5 = 12 cm. It rained 12 centimeters more on Tuesdays than on Mondays.
The answer is 12.