We have a question: Five dozens of people are attending your family reunion. Your family was assigned to bring the cans of soda. Each box of soda contains 10 cans and costs $2 per box. It was assumed that each person can consume 2 cans of soda. If you are six in the family and agreed to pay equally for the cost, how much will each of your family members pay?
And an answer: 4
So how you got the answer?
Five dozens of people is equal to 5 x 12 = 60. 60 x 2 = 120 cans of soda are needed. So, this means 120 / 10 = 12 boxes of soda must be purchased. Thus, it will amount to $2 x 12 = $24. Therefore, each family member will pay $24 / 6 = $4.

We have a question: James needs 40 fish to make one sushi roll. He goes to the market and buys 400 fish, but later finds out that 20% of the fish have gone bad and cannot be used. How many sushi rolls did James make with the remaining fish?
And an answer: 8
So how you got the answer?
If James bought 400 fish, the number of fish that were bad is 20 / 100 * 400 = 80. The remaining fish that he used to make the sushi rolls is 400 - 80 = 320. If 40 fish are required to make one sushi roll, 320 fish will make 320 / 40 = 8 sushi rolls.

We have a question: Two apartment roommates split the rent, utilities, and grocery payments equally each month. The rent for the whole apartment is $1100 and utilities are $114. If one roommate pays $757 in all, how many dollars are groceries for the whole apartment?
And an answer: 300
So how you got the answer?
Rent plus utilities for the whole apartment is 1100 + 114 = $1214. If one roommate pays $757 in all, the total cost of everything is 757 * 2 = 1514. The groceries cost 1514 - 1214 = 300.