Question
A box containing 80 staplers had a mass of 6.3 kg. A box containing 25 folders has a mass of 7.7 kg. The mass of each folder was four times that of each stapler. Find the mass of the empty box in grams.
4 m

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A box containing 80 staplers had a mass of 6.3 kg. A box containing 25 folders has a mass of 7.7 kg. The mass of each folder was four times that of each stapler. Find the mass of the empty box in grams.