Question
Elizabeth wants to buy 15 identical pencils as follows.
1 for $4.20
6 for $23.30
What is the least amount of money she needs to buy 15 such pencils?
3 m

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Elizabeth wants to buy 15 identical pencils as follows.
1 for $4.20
6 for $23.30
What is the least amount of money she needs to buy 15 such pencils?