Question: Moore's family compared mobile phone plans to get the best deal. At T-Mobile, the family plan costs $50 per month for the first two lines and $16 for each additional line. At M-Mobile, the family plan costs $45 for the first two lines and $14 for each additional line. Moore's family needs to purchase 5 cell phone lines. How much cheaper is the M-Mobile than T-Mobile?
Answer: The three additional lines at T - Mobile cost $16 x 3 = $48. The total cost of the family plan at T - Mobile is $50 + $48 = $98. The three additional lines at M - Mobile cost $14 x 3 = $42. The total cost of the family plan at M - Mobile is$45 + $ 42 = $87. Therefore, M - Mobile is $98 - 87 = $11 cheaper than T - Mobile. The answer is 11.
[Question]It takes Jennifer 20 minutes to groom each of her 2 long hair dachshunds. If she grooms her dogs every day, how many hours does she spend grooming her dogs in 30 days?
[Answer]She has 2 dogs and it takes 20 minutes to groom just 1 dog so it takes her 2 * 20 = 40 minutes per day to groom 2 dogs. In 30 days, she will have spent 30 * 40 = 1,200 minutes grooming her dogs. There are 60 minutes in an hour so she spends 1200 / 60 = 20 hours grooming her dogs. The answer is 20.
Q: The big bottles of mango juice hold 30 ounces and cost 2700 pesetas each. The small bottles hold 6 ounces and cost 600 pesetas each. How many pesetas would be saved by buying a big bottle instead of smaller bottles for the same volume of juice?
A: The equivalent is 30 / 6 = 5 small bottles. Five small bottles at 600 pesetas each is 5 * 600 = 3000 pesetas. The savings is 3000 - 2700 = 300. The answer is 300.
Question: Marla is thinking about getting a canvas tote bag to avoid using plastic bags at the grocery store. If making the canvas bag released 600 pounds of carbon dioxide, each plastic bag released 4 ounces of carbon dioxide, and Marla uses eight bags per shopping trips, how many shopping trips will she have to make before the canvas bag is the lower-carbon solution? (There are 16 ounces in a pound.)
Answer: First find how many ounces of carbon dioxide are released per shopping trip: 8 bags / trip * 4 oz / bag = 32 oz / trip. Then divide that amount by the number of ounces per pound to find the pounds of carbon per shopping trip: 32 oz / trip / 16 oz / pound = 2 pounds / trip. Then divide the amount of carbon used to make the tote bag by the amount of carbon saved per shopping trip to find the number of trips needed for the bag to be a better option: 600 pounds / 2 pounds / trip = 300 trips. The answer is 300.
[Question]For a New Year’s Eve appetizer, Alex is serving caviar with potato chips and creme fraiche. He buys 3 individual bags of potato chips for $1.00 each and dollops each chip with some creme fraiche that costs $5.00 and then the $73.00 caviar. This appetizer will serve 3 people. How much will this appetizer cost per person?
[Answer]He buys 3 bags of potato chips for $1.00 each so that’s 3 * 1 = $3.00. The chips are $3.00, the creme fraiche is $5.00 and the caviar is $73.00 for a total of 3 + 5 + 73 = $81.00. The appetizer costs $81.00 and will serve 3 people so it will cost 81 / 3 = $27.00 per person. The answer is 27.
[Question]John has to restring 3 basses with 4 strings each, twice as many guitars which have 6 strings each, and 3 fewer 8 string guitars than the normal guitars. How many strings does he need?
[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
The basses take 3 * 4 = 12 strings. He restrings 2 * 3 = 6 normal guitars. That takes 6 * 6 = 36 strings. He restrings 6 - 3 = 3 guitars with 8 strings. So that uses 3 * 8 = 24 strings. So he uses 12 + 36 + 24 = 72 strings. The answer is 72.