Question
Zoe wants to buy 17 identical files as follows.
1 for $4.30
5 for $20.70
What is the least amount of money she needs to buy 17 such files?
3 m

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Zoe wants to buy 17 identical files as follows.
1 for $4.30
5 for $20.70
What is the least amount of money she needs to buy 17 such files?