Sam is stocking up on canned tuna. He got 9 cans at the supermarket, and had 5 coupons for 25 cents off a single can per coupon. He paid $20 and got $5.50 in change. How many cents does a can of tuna cost? Give the rationale and then the answer.
Let's think step by step. His total without the coupons was $20 - $5.50 = $14.50. He had 5 coupons that each saved him 25 cents, so the full price of all the tuna is $14.50 + 5 * $0.25 = $15.75. He bought 9 cans of tuna, so each can costs $15.75 / 9 = $1.75. As 1 dollar has 100 cents 1.75 * 100 = 175 cents.. The answer is: 175.

Jeff bought 6 pairs of shoes and 4 jerseys for $560. Jerseys cost 1/4 price of one pair of shoes. Find the shoe's price total price. Give the rationale and then the answer.
Let's think step by step. Let X be the shoe price. The jersey's price is 1 / 4 * X. Jeff bought 6 pairs of shoes and 4 jerseys for 6 * X + 4 * (1 / 4X) = $560. Multiplying through the parentheses produces 6X + X = $560. Combining like terms produces 7X = $560. Dividing both sides by 7 produces X = $80, so the shoe price is $80. Since Jeff bought 6 pairs of shoes, he spent 80 * 6 = $480 on shoes.. The answer is: 480.

Last week, a farmer shipped 10 boxes of pomelos which had 240 pomelos in all. This week, the farmer shipped 20 boxes. How many dozens of pomelos did the farmer ship in all? Give the rationale and then the answer.
Let's think step by step. There were 240 / 10 = 24 pomelos in a box. This means that each box has 24 / 12 = 2 dozens of pomelos since 1 dozen is equal to 12. The farmer shipped a total of 10 + 20 = 30 boxes. Thus, the farmer shipped a total of 30 x 2 = 60 dozens of pomelos.. The answer is: 60.