[Question]Ryan started with 36 tokens at the arcade. Ryan wasted a third of his tokens on Pac-Man, a fourth of his tokens on Candy Crush, and 7 on Ski-ball. Then, his parents bought him seven times as many tokens as he spent on Ski-ball. How many tokens did Ryan end up with?
[Answer]Ryan used 36 / 3 = 12 tokens on Pac - Man. Ryan used 36 / 4 = 9 tokens on Candy Crush. Ryan used a total of 12 + 9 + 7 = 28 tokens on all three games. Ryan had 36 - 28 = 8 tokens left. Ryan’s parents bought him 2 * 7 = 14 more tokens. Ryan had 8 + 14 = 22 tokens after his parents bought him some. The answer is 22.

[Question]If Amanda can run the length of a football field 2000 meters in length in 2 hours, how long would it take her to run the length of a 10000-meter track at the same speed?
[Answer]Running the length of a football field 2000 meters in 2 hours is a speed of 2000 / 2 = 1000 meters per hour. At the same speed, Amanda will run the length of a 10000 - meter track in 10000 / 1000 = 10 hours. The answer is 10.

[Question]There are 14 green papayas on the papaya tree. On Friday, two of the fruits turned yellow. On Sunday, twice as many fruits as on Friday turn yellow. How many green papayas are left on the tree?
[Answer]On Sunday 2 x 2 = 4 papayas turned yellow. A total of 2 + 4 = 6 papayas turned yellow. There are 14 - 6 = 8 green papayas still left on the tree. The answer is 8.

[Question]A pipe is clogged so that only 2 ounces of cleaner can run through the pipe per minute. After fifteen minutes, the cleaner has unclogged it enough that 3 ounces can run through per minute. Ten minutes later, the clog is cleared enough for 4 ounces to run through per minute. How many ounces of cleaner were used after 30 minutes?
[Answer]

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
For 15 minutes at 2 ounces per minute, 2 * 15 = 30 ounces were used. For the next 10 minutes at 3 ounces per minute, 3 * 10 = 30 ounces were used. There are 30 - 15 - 10 = 5 minutes remaining. For the next 5 minutes at 4 ounces per minute, 4 * 5 = 20 ounces were used. After 30 minutes, 30 + 30 + 20 = 80 ounces of cleaner were used. The answer is 80.