Question
The stationery kiosk has a special offer for files:

1 file for $1.20
4 files for $4

Liam wants to buy 10 files. What is the least amount he has to pay?
3 m

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The stationery kiosk has a special offer for files:

1 file for $1.20
4 files for $4

Liam wants to buy 10 files. What is the least amount he has to pay?