[Question]Jack has 65 pounds of sugar today. Tomorrow he will use 18 pounds of sugar and the following day he will buy 50 more pounds of sugar. How many pounds will he have in the end?
[Answer]Jack will have 65 - 18 = 47 pounds of sugar tomorrow. Jack will have 47 + 50 = 97 pounds of sugar the following day. The answer is 97.

[Question]John has been having trouble sleeping lately. In the past week he was only able to get 3 hours of sleep on 2 of the days and on the remaining days he was only able to get 60% of the recommended 8 hours of sleep. How much sleep did he get this week?
[Answer]For the 2 days he gets 2 * 3 = 6 hours. He gets 60% of the recommended amount for 7 - 2 = 5 days. On those days he gets 8 * .6 = 4.8 hours. So he gets 5 * 4.8 = 24 hours. So he gets a total of 24 + 6 = 30 hours of sleep. The answer is 30.

[Question]Maddy is in college for 8 semesters. She needs 120 credits to graduate. If each class is 3 credits, how many classes does she need to take per semester?
[Answer]120 credits / 3 credits is 40. 40 credits / 8 semester = 5 classes per semester. Maddy needs to take 5 classes per semester. The answer is 5.

[Question]You can lower the price by 20% if you buy more than fifteen units of iPhone cases. If you pay $500 to buy 18 units, what is the original price?
[Answer]
If you buy 18 units, the percentage of the total price drops to 100% - 20% = 80%. If 80% is equal to $500, then 100% is equals 100% / 80% * $500 = $625. The answer is 625.