Case $6-4$ Broadcasting the Olympic Games

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b$.$ Rachel is considering leasing additional airplanes to achieve economies of scale. The leasing cost of each one again would be $$30,000$ per day. Perform what$-$if analysis to determine whether it would be worthwhile to have $5,6,$ or $7$ airplanes instead of $4.$

c$.$ Now repeat part a under the more realistic assumption that there is a minimum turnaround time of $30$ minutes on the ground for unloading and loading passengers between the arrival of a flight and the departure of the next flight by the same airplane. $($Most airlines use a considerably longer

turnaround time.$)$ Does this change the number of flights that can be flown?

d$.$ Rachel now is considering having each of the four airplanes carry freight instead of flying empty if it flies overnight to another city. Instead of a cost of $$5,000,$ this would result in net revenue of $$5,000.$ Adapt the spreadsheet model used in part $c$ to find the feasible combination of flights that maximizes the total profit. Does this change the number of airplanes that fly overnight to another city?