Lizzy: Amber goes to the store and buys 10 rolls of toilet paper, 7 rolls of paper towels, and 3 boxes of tissues. One roll of toilet paper costs $1.50. One roll of paper towels costs $2. If the total cost of all the items is $35, how much does one box of tissues cost?.
Me: Hmmm, let me think. I think this is the detailed solution:
The total cost of toilet paper is 10 * $1.5 = $15. The total cost of paper towels is 7 * $2 = $14. The total cost of tissues is $35 - $15 - $14 = $6. The cost of one box of tissues is $6 / 3 = $2. Final answer: 2.