6. Suad Alwan, the purchasing agent for Dubai Airlines, has determined that the second plane took 20,000 hours to produce. Using an 80% learning curve and a $35-per-hour labor charge, he wants to determine the cost of the five additional planes. Time required for the fifth unit = Cost of the fifth unit = Time required for the sixth unit = Cost of the sixth unit = Time required for the seventh unit = Cost of the seventh unit = hours (round your response to the nearest whole number). dollars (round your response to the nearest whole number). hours (round your response to the nearest whole number). dollars (round your response to the nearest whole number). hours (round your response to the nearest whole number). dollars (round your response to the nearest whole number).