What is the Time Required for the Fifth Unit in hours?

Question Help Suad Awan, the purchasing agent for Dubai itines, tus determined that the third plane took 20,000 hours to produce. Using an 80% learning curve and a $5 per hour labor charge, he wants to determine the cost of the four additional planes Time required for the fourth 18231 hours fround your response to the west whole number) Cost of the fourth 638085 desfars round your response to the part wherumber Time required for the Itht h ours fround your response to the newest whole number)