Karl and Leonard want to make perfume. In order to get the right balance of ingredients for their tastes they bought 3 ounces of rose oil at $4.99 per ounce, 5 ounces of ginger essence for $3.34 per ounce, and 4 ounces of black currant essence for $4.31 per ounce. Determine the cost per ounce of the perfume. C The cost per ounce of the perfume is $ (Round to the nearest cent.)

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