Question
The bookstore has a special offer for notebooks:

1 notebook for $3.20
3 notebooks for $9

Tommy wants to buy 7 notebooks. What is the least amount he has to pay?
3 m

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The bookstore has a special offer for notebooks:

1 notebook for $3.20
3 notebooks for $9

Tommy wants to buy 7 notebooks. What is the least amount he has to pay?