A shopkeeper purchase volleyballs for $10 each and sells them for $18 each. If the cost of the balls increases by 50% for two months in a row, what is the smallest percentage increase the shopkeeper can apply to the selling price in order to avoid selling at a loss?

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adminArithmetic
A shopkeeper purchase volleyballs for $10 each and sells them for $18 each. If the cost of the balls increases by 50% for two months in a row, what is the smallest percentage increase the shopkeeper can apply to the selling price in order to avoid selling at a...