[Question]Edith is a receptionist at a local office and is organizing files into cabinets. She had 60 files and finished organizing half of them this morning. She has another 15 files to organize in the afternoon and the rest of the files are missing. How many files are missing?
[Answer]Edith has already organized 60 files / 2 = 30 files in the morning. She has files left to organize so she must still have 30 + 15 = 45 files in the office. This means there are 60 total files – 45 organized files = 15 missing files. The answer is 15.

[Question]Sol sells candy bars to raise money for her softball team. On the first day, she sells ten candy bars and sells four more candy bars than she sold the previous day each day afterward. If she sells six days a week and each candy bar costs 10 cents, how much will she earn in a week in dollars?
[Answer]Sol will sell 10 + 4 = 14 candies on the second day. She will sell 14 + 4 = 18 candies on the third day. She will sell 18 + 4 = 22 candies on the fourth day. She will sell 22 + 4 = 26 candies on the fifth day. She will sell 26 + 4 = 30 candies on the sixth day. She will sell a total of 10 + 14 + 18 + 22 + 26 + 30 = 120 candies in a week. Hence, she will earn 120 x 10 = 1200 cents. Since 1 dollar is equal to 100 cents, then Sol will earn 1200 / 100 = $12. The answer is 12.

[Question]Julie is making caesar salad for a family picnic. At the market, she spends $8 on green lettuce and $6 on red lettuce. If each type of lettuce costs $2 per pound, how many total pounds of lettuce did she buy?
[Answer]The total cost of the green and red lettuce is $8 + $6 = $14. Julie bought $14 / $2 = 7 pounds of lettuce. The answer is 7.

[Question]A plumber bought 10 meters of copper and 5 more meters of plastic pipe. If each meter cost $4, how much did the plumber spent on the copper and plastic pipe?
[Answer]
He bought 10 + 5 = 15 meters of plastic pipe. The total meters of the copper and plastic pipe is 10 + 15 = 25. The plumber spent $4 x 25 = $100 on copper and plastic pipe. The answer is 100.