Give the step-by-step reasoning process and then the final answer. Peggy buys 3 folders, one each in the colors red, green, and blue. She puts ten sheets of paper in each folder, and then, she puts star-shaped stickers on each sheet of paper. In the red folder, each sheet of paper gets 3 stickers. In the green folder, each sheet of paper gets 2 stickers, and in the blue folder, each sheet gets 1 sticker. What is the total number of stickers Peggy uses?
For the red folder, 10 sheets of paper get 3 stickers each, for a total of 10 * 3 = 30 stickers. For the green folder, 10 sheets of paper get 2 stickers each, for a total of 10 * 2 = 20 stickers. For the blue folder, 10 sheets of paper get 1 sticker each, for a total of 10 * 1 = 10 stickers. In total, she uses 30 + 20 + 10 = 60 stickers.
The final answer: 60.