ControlSuad$$ Alwan, the purchasing agent for Dubai$$ Airlines, has determined that the plane took hours to produce. Using an $\%$ learning curve and a $-$per$-$hour labor$$ charge, he wants to determine the cost of the additional planes.$$

Part $2$

Time required for the unit$=$

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enter your response here hours$($round your response to the nearest whole$$ number$).$