Ester and George want to make perfume. In order to get the right balance of ingredients for their tastes they bought 4 ounces of rose oil at $4.05 per ounce, 2 ounces of ginger essence for $4.46 per ounce, and 2 ounces of black currant essence for $2 43 per ounce. Determine the cost per ounce of the perfume. The cost per ounce of the perfume is $ . (Round to the nearest cent.)