For the red folder, 10 sheets of paper get 3 stickers each, for a total of 10*3=<<10*3=30>>30 stickers.
For the green folder, 10 sheets of paper get 2 stickers each, for a total of 10*2=<<10*2=20>>20 stickers.
For the blue folder, 10 sheets of paper get 1 sticker each, for a total of 10*1=<<10*1=10>>10 stickers.
In total, she uses 30+20+10=<<30+20+10=60>>60 stickers.
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