Question: Allen ordered five boxes of pizza, which cost $7 each box. He then gave a tip which amounts to 1/7 of the total cost of his order. If he gave the delivery man $100, how much change did he receive?
Answer with step-by-step thinking: The total cost of five boxes of pizza is $7 x 5 = $35. He gave $35 x 1 / 7 = $5 tip to the delivery man. He spent a total of $35 + $5 = $40 for the pizza and the tip. The change that he received is $100 - $40 = $60.
So the answer is 60.


Question: The number of Oreos and cookies in a box is in the ratio 4:9. Zane bought each Oreo at $2 and each cookie at $3. How much more money did Zane spend on buying the cookies than buying the Oreos if the total number of items in the box is 65?
Answer with step-by-step thinking: The total ratio representing the number of cookies and Oreos that Zack bought is 4 + 9 = 13. The fraction representing the number of Oreos Zane bought is 4 / 13, and since the total number of items in the box is 65, Zane bought 4 / 13 * 65 = 20 Oreos. If Zane bought 20 Oreos at $2 each, the total cost of buying Oreos is $2 * 20 = $40. Since the total number of items in the box is 65, and there are 20 Oreos in the box, the number of cookies in the box is 65 - 20 = 45. The cost of buying the cookies at $3 each is 45 * $3 = $135. If the Oreos cost $40 to buy, Zane used $135 - $40 = $95 more to buy Cookies than Oreos.
So the answer is 95.


Question: Henry drinks 15 bottles of kombucha every month. Each bottle costs $3.00 and is eligible for a cash refund of $0.10 per bottle when he takes it to a recycling center. After 1 year, how many bottles of kombucha will he be able to buy after he receives his cash refund?
Answer with step-by-step thinking:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
He drinks 15 bottles every month and there are 12 months in 1 year so that's 15 * 12 = 180 bottles. He earns $0.10 on every bottle that he recycles so that's .10 * 180 = $18.00. He has $18.00 and each bottle costs $3.00 so he can buy 18 / 3 = 6 bottles.
So the answer is 6.