John buys game loot boxes for $5 each. The average value of items inside is $3.5.  He spends $40 on loot boxes. What is the average amount he lost? Give the rationale and then the answer.
Let's think step by step. He bought 40 / 5 = 8 boxes. He loses an average of 5 - 3.5 = $1.50 per box. So he loses an average of 1.5 * 8 = $12.. The answer is: 12.

Mark bought a shirt, pants, and shoes for $340. What is the price of the pants knowing that the price of a shirt is three-quarters of the price of the pants and that the price of a shoe is ten dollars more than the price of the pants? Give the rationale and then the answer.
Let's think step by step. Let X be the price of the pants. The price of the shirt is 3 / 4 * X. The price of the shoes is X + 10. The total amount paid is X + 3 / 4 * X + X + 10 = $340. Combining like terms we get X * 11 / 4 + 10 = $340. Subtracting 10 from both sides we get X * 11 / 4 = $330. Dividing both sides by 11 / 4 we get X = $120.. The answer is: 120.

Merry had 50 boxes of apples on Saturday and 25 boxes on Sunday. There were 10 apples in each box. If she sold a total of 720 apples on Saturday and Sunday, how many boxes of apples are left? Give the rationale and then the answer.
Let's think step by step. Merry had a total of 50 + 25 = 75 boxes of apples. These 75 boxes is equal to 75 x 10 = 750 apples. There were 750 - 720 = 30 apples left. Thus, 30 / 10 = 3 boxes of apples are left.. The answer is: 3.