Q: James visits 20 houses to try and make a sale. He manages to sell something in every house. The next day he visits twice as many houses but only sold to 80% of houses. If he sold two things at each house in each of the two days, how many items did he sell?
A: The second day he visited 20 * 2 = 40 houses. So he sold things at 40 * .8 = 32 houses. So in total he sold things at 20 + 32 = 52 houses. That means he sold 52 * 2 = 104 things. The answer is 104.
Question: Christina walks 7km to school every day from Monday to Friday. She returns home covering the same distance. Last Friday her mother asked her to pass by her friend, which is another 2km away from the school in the opposite distance from home. How many kilometers did Christina cover that week?
Answer: One trip to school is 2 * 7 km = 14km. In one week, Christina walks 14 km / day * 5 days / week = 70km to school. The extra trip to her mum's friend added 2 km * 2 = 4km to her travel distance. Her total distance was thus 70 km + 4 km = 74 km. The answer is 74.
[Question]There were students from three different schools taking part in a debate organized by the town's mayor on a stage. The first school had twice as many students as the second school, and the second school had 40 more students than the third school. If the third school had 200 students, and after the debate was over, every student shook the mayor's hand, calculate the total number of students who shook the mayor's hand on the stage.
[Answer]If the third school had 200 students, and the second school had 40 more students than the third school, the second school had 200 + 40 = 240 students. The third and second schools had 240 + 200 = 440 students on stage taking part in the debate. Since the first school had twice as many students as the second school, and the second school had 240 students, the first school had 240 * 2 = 480 students on stage taking part in the debate. If after the debate was over, every student at the stage shook the mayor's hand, the number of students who shook the mayor's hand is 480 + 440 = 920 students. The answer is 920.
Q: Noa scored 30 points to win a bowl, and Phillip scores twice that number. What is the total number of points Tom and Phillip scored to win the bowl?
A: If Philip scored twice the number of points Noa scored to win the bowl, he scored 2 * 30 = 60 points. To win the bowl, they scored together a total of 60 + 30 = 90 points. The answer is 90.
Question: Xavier is twice as old as Yasmin is. Xavier will 30 years old in six years. What is the total of their ages now?
Answer: If in six years Xavier will be 30 years old, he is 30 - 6 = 24 years old now. If Xavier is twice as old as Yasmin, Yasmin is 24 / 2 = 12 years old. The total of their ages now is 12 + 24 = 36 years. The answer is 36.
Q: A club with 30 members ordered fruit juices. Two-fifths of them ordered lemon juice. One-third of the remaining members ordered mango juice, and the rest ordered orange juice. How many members ordered orange juice?
A:

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.
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30 x 2 / 5 = 12 members ordered lemon juice. So, 30 - 12 = 18 members did not order lemon juice. Since 1 / 3 of the remaining ordered mango juice, then 18 x 2 / 3 = 12 members ordered mango juice. Therefore, 18 - 12 = 6 members ordered orange juice. The answer is 6.