Question: Shelly makes braided keychains for her friends at school. Each keychain takes 12 inches of thread to braid. This year, she made six friends in classes and half that number from after-school clubs. She wants to make each of them a keychain. How many inches of thread does Shelly need?
Answer: Shelly made 6 / 2 = 3 friends from after - school clubs. She made 6 + 3 = 9 new friends at school this year. Shelly will need 9 * 12 = 108 inches of thread to make each friend a keychain. The answer is 108.
[Question]A library has a number of books. 35% of them are intended for children and 104 of them are for adults. How many books are in the library?
[Answer]65% of the library books are for adults because 100 - 35 = 65. There are 160 library books in total because 104 / .65 = 160. The answer is 160.
Q: The coach of a football team asked his players to do six laps of the field. The field is in the shape of a rectangle of length 100 m and width 50 m. What is the distance each player will run, in meters?
A: One lap corresponds to the perimeter of a rectangle of 100 m length and 50 m width: 2 * 100 + 2 * 50 = 300 metres. Each player has to do six turns of the field, so runs 6 * 300 = 1800 meters. The answer is 1800.
Question: Lorie has 2 pieces of $100 bills. He requested to change one piece of the $100 bills into $50 bills. Half of the remaining $100 bill is changed to $10 bills while the rest is changed to $5 bills. How many pieces of bills will she have?
Answer: There will be $100 / $50 = 2 pieces of $50 when $100 is changed to $50 bills. Half of $100 is $100 / 2 = $50. So there will be $50 / $10 = 5 pieces of $10 when $50 is changed to $10 bills. The remaining $50 will be changed to $5 bills so there will be $50 / $5 = 10 pieces of $5 bills. So in total, Lorie will have 2 $50 bills + 5 $10 bills + 10 $5 bills = 17 pieces of bills. The answer is 17.
[Question]At peak season, 6 packs of tuna fish are sold per hour, while in a low season 4 tuna packs are sold per hour. If each tuna pack is sold at $60, How much more money is made in a day during a high season than a low season if the fish are sold for 15 hours?
[Answer]6 packs of tuna fish are sold per hour. If the sales are made for 15 hours, the total number of packs sold is 4 = 6 * 15 = 90 packs. At $60 per pack, during a high season, the total sales in 15 hours are 90 * $60 = $5400. 4 packs of tuna fish are sold per hour. If the sales are made for 15 hours, the total number of packs sold is 4 * 15 = 60 packs. At $60 per pack, during a low season, the total sales in 15 hours are 60 * $60 = $3600. The amount of money that is made after 15 hours during a high season than a low season is $5400 - $3600 = $1800. The answer is 1800.
[Question]Beckett is 12 and is three years younger than Olaf, while Shannen is two years younger than Olaf. If Jack is five more than twice as old as Shannen, what is the sum of the ages of all 4 people?
[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
Olaf is 12 years + 3 years = 15 years old. Shannen is 15 years old - 2 years = 13 years old. Jack is 5 years + (2 * 13 years) = 31 years old. The sum of all of their ages is 12 + 15 + 13 + 31 = 71 years old. The answer is 71.