Answer the following question.
Carl buys index cards for his class. He gives each student 10 index cards. He teaches 6 periods a day and each class has 30 students. If a 50 pack of index cards cost $3 how much did he spend on them all?
Step-by-step reasoning process: He has 30 * 6 = 180 students. So he needs to buy 180 * 10 = 1800 index cards. That means he needs to buy 1800 / 50 = 36 packs of index cards. So he spends 36 * 3 = $108.
The answer is 108.

Answer the following question.
Coby went on a road trip. He is traveling from Washington to Nevada but he needs to stop in Idaho which is 640 miles away from Washington and 550 miles away from Nevada to pick up some friends. If Coby is traveling at a speed of 80 miles per hour going to Idaho and at a speed of 50 miles per hour from Idaho to Nevada, how many hours did it take for him to arrive at the destination?
Step-by-step reasoning process: The estimated time of arrival from Washington to Idaho is 640 / 80 = 8 hours. So, the estimated time of arrival from Idaho to Nevada is 550 / 50 = 11 hours. Therefore, It took him 11 + 8 = 19 hours to arrive at the destination.
The answer is 19.

Answer the following question.
Lucas' father offers to pay him $2 for each window in the house that he cleans. Each floor of Lucas' house has 3 windows; Lucas lives in a 3-story house. To get Lucas to finish the job faster, his father tells him that he will subtract $1 for every 3 days that pass without Lucas finishing the job. In 6 days, Lucas finishes cleaning all the windows in the house. How much will his father pay him, in dollars?
Step-by-step reasoning process: Lucas cleans a total of 3 floors * 3 windows / floor = 9 windows. The windows cleaned earn Lucas 2 dollars each, so Lucas earns 9 windows * $2 / window = $18. For taking 6 days to clean, Lucas' father subtracts 6 days / $3 / day = $2. In total, Lucas' father will pay him $18 - $2 = $16.
The answer is 16.

Answer the following question.
Sally needs to make a tablecloth that measures 102 inches by 54 inches. She also needs to make 8 napkins that are 6 by 7 inches. How many square inches of material will Sally need to make the tablecloth and the 8 napkins?
Step-by-step reasoning process: Tablecloth = 102 * 54 = 5508 square inches. Napkins = 8 * (6 * 7) = 336 square inches. 5508 + 336 = 5844 square inches. Sally will need 5844 square inches of material to make the tablecloth and 8 napkins.
The answer is 5844.