Suad$$ Alwan, the purchasing agent for Dubai$$ Airlines, has determined that the third plane took $20,000$ hours to produce. Using an $75\%$ learning curve and a $$$$30$ per$-$hour labor$$ charge, he wants to determine the cost of the six additional planes.$$

Part $2$

Time required for the sixth unit$=$

$$

$15000$ hours$($round your response to the nearest whole$$ number$).$

Part $3$

Cost of the sixth unit$=$

$$

$450,000$ dollars$($round your response to the nearest whole$$ number$).$

Part $4$

Time required for the seventh unit$=$

$$

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

Part $5$:

Cost of the seventh unit$=$

Part $6$:

Time required for the eigth unit$=$

Part $7$:

Cost of the eigth unit$=$