Q: Lexie is 6 years older than her brother and her sister is twice her age. If Lexie is 8, what is the age difference between her brother and her sister?
A: Lexie's brother is 8 - 6 = 2 years old. Her sister is 8 x 2 = 16 years old. The age difference between her brother and sister is 16 - 2 = 14 years. The answer is 14.
Question: On the night of the dance, 400 students show up to the party. 70% of the students who showed up were invited. If 40% of those invited to the party had their invitation revoked and were not allowed into the party, how many invited students attended the party?
Answer: On the night of the dance 70 / 100 * 400 = 280 students who showed up to the party were invited. If 40% of those invited to the party had their invitation revoked, there were 40 / 100 * 280 = 112 students who showed up and had their invitation revoked. The number of invited students who attended the party is 280 - 112 = 168. The answer is 168.
[Question]Oliver has 4 friends that he is inviting to a party at the arcade. Game tokens cost 30 for $1. Each game costs 2 tokens. If he wants all his friends to get to play 60 games each, how much will it cost?
[Answer]He needs to buy enough tokens for 240 games because 4 x 60 = 240. He needs to buy 480 tokens because 2 x 240 = 480. He needs to spend 160 because 480 / 30 = 16. The answer is 16.
Q: On Monday, Sydney sends 5 texts each to Allison and Brittney. On Tuesday, she sends 15 texts to each of them. In total, how many texts did Sydney send to Allison and Brittney on both days?
A: Sydney sends 5 * 2 = 10 texts on Monday. Sydney sends 15 * 2 = 30 texts on Tuesday. In total, Sydney sends 10 + 30 = 40 texts on both days. The answer is 40.
Question: Lyanna set up a food bank to collect food to give to the homeless in her local town. In the first week, 40 pounds of food were donated to the food bank by the people of her local town. In the second week, donations were twice as high as the first week. If she gave out 70% of the donated food to the homeless in the third week, calculate the amount of food remaining in the food bank.
Answer: If 40 pounds of food was donated to the food bank in the first week, the second week, which had twice the amount of food donated as the first week, had 2 * 40 = 80 pounds of food. The total amount of food donated to the food bank after the second week is 40 + 80 = 120 pounds. In the third week, she gave to the homeless 70 / 100 * 120 = 84 pounds of food. The total amount of food remaining in the food bank after she gave out 70% to the homeless is 120 - 84 = 36 pounds of food. The answer is 36.
Q: Barbara went shopping in a supermarket. She bought 5 packs of tuna for $2 each and 4 bottles of water for $1.5 each. In total, she paid $56 for her shopping. How much did Barbara spend on different than the mentioned goods?
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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For the tuna Barbara needed to pay 5 * 2 = $10. For the four bottles of water, she needed to pay 4 * 1.5 = $6. On different goods Barbara spend 56 - 10 - 6 = $40. The answer is 40.