$**$URGENT$**$Suad Alwan, the purchasing agent for Dubai Airlines, has determined that the third plane took $18,000$ hours to produce. Using an $80\%$ learning curve and a $$30-$per$-$hour

labor charge, he wants to determine the cost of the six additional planes.

Time required for the sixth unit $=$

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

Cost of the sixth unit $=$

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

Time required for the seventh unit $=$

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

Cost of the seventh unit$=$ dollars $($round your response to the nearest whole number$).$

Time required for the eighth unit $=$

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

Cost of the eighth unit$=$ dollars $($round your response to the nearest whole number$).$