Question
The stationery shop has a special offer for highlighters:

1 highlighter for $3.30
3 highlighters for $9

Ivan wants to buy 11 highlighters. What is the least amount he has to pay?
3 m

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The stationery shop has a special offer for highlighters:

1 highlighter for $3.30
3 highlighters for $9

Ivan wants to buy 11 highlighters. What is the least amount he has to pay?