Question: Tracy set up a booth at an art fair. 20 people came to look at her art. Four of those customers bought two paintings each. The next 12 of those customers bought one painting each. The last 4 customers bought four paintings each. How many paintings did Tracy sell at the art fair?
Answer: The first 4 customers bought 4 * 2 = 8 paintings. The next 12 customers bought 12 * 1 = 12 paintings. The last 4 customers bought 4 * 4 = 16 paintings. In total Tracy sold 8 + 12 + 16 = 36 paintings. The answer is 36.
[Question]In today's field day challenge, the 4th graders were competing against the 5th graders. Each grade had 2 different classes. The first 4th grade class had 12 girls and 13 boys. The second 4th grade class had 15 girls and 11 boys. The first 5th grade class had 9 girls and 13 boys while the second 5th grade class had 10 girls and 11 boys. In total, how many more boys were competing than girls?
[Answer]When you add up all the girls from all 4 classes, you had 12 + 15 + 9 + 10 = 46 girls. When you add up all the boys from all 4 classes, you had 13 + 11 + 13 + 11 = 48 boys. There are 48 boys and 36 girls so 48 - 46 = 2 more boys. The answer is 2.
Q: Aron spends 30 minutes/day three times a week vacuuming and 20 minutes/day 2 days a week dusting. How much time does he spend cleaning total each week?
A: First find the total time Aron spends vacuuming: 30 minutes / day * 3 days / week = 90 minutes / week. Then find the total time Aron spends dusting: 20 minutes / day * 2 days / week = 40 minutes / week. Then add those two times to find Aron's total cleaning time per week: 90 minutes / week + 40 minutes / week = 130 minutes / week. The answer is 130.
Question: Tim gets a manicure and tips the beautician 30%. If the manicure cost $30 how much did he pay in total?
Answer: He gave a tip of 30 * .3 = $9. So in total he paid 30 + 9 = $39. The answer is 39.
[Question]In the cafeteria, Athena wants to buy snacks for her friends. She bought 3 sandwiches at $3 each and 2 fruit drinks at $2.5 each. How much did she spend in all?
[Answer]Athena spent 3 x $3 = $9 on sandwiches. She spent 2 x $2.5 = $5 on fruits drinks. Therefore, Athena spent $9 + $5 = $14 in all. The answer is 14.
[Question]Paul has five dogs. For every 10 pounds they weigh, they need 1 pound of dog food per day. One weighs 20 pounds. One weighs 40. Another weighs 10. One weighs 30 and the final one weighs 50 pounds. How much dog food does he need each day?
[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.
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The dog’s total weight is 150 because 20 + 40 + 10 + 30 + 50 = 150. They need 15 pounds a day because 150 / 10 = 15. The answer is 15.