Question
Joseph wants to buy 16 identical pencils as follows.
1 for $4.70
6 for $21.70
What is the least amount of money she needs to buy 16 such pencils?
3 m

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Joseph wants to buy 16 identical pencils as follows.
1 for $4.70
6 for $21.70
What is the least amount of money she needs to buy 16 such pencils?