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Suppose that a movie studio is deciding on the quality ξ of its next film. Anticipated revenues in $millions (from ticket sal

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Answer #1

a)

Profit is given by

\pi =R(\xi)-C(\xi)

\pi =10\xi+5\xi ^{2}-\left [ 6\xi ^{2}+24 \right ]

\pi =10\xi-\xi ^{2}-24

To find maximum profit set

\frac{d\pi }{d\xi }=0

10-2\xi=0

\xi=5

Optimal quality is 5

b)

\pi =10\xi-\xi ^{2}-24

Put\: \: \xi=5

\pi =10*5-5 ^{2}-24=1

Firm can make $1 million in this project.

c)

R(\xi )=10\xi +5\xi ^{2}

MR=dR(\xi )/d\xi =10+10\xi

Put\: \: \xi=5

MR=10+10*5=60

C(\xi )=6*(\xi ^{2}+4)

MC=dC(\xi )/d\xi =12\xi

Put\: \: \xi=5

MC=12\xi=12*6=60

We can observe that MR=MC

d)

If additional fixed cost which is equal to profit is incurred, profit would be zero.

At this stage one would be indifferent between proceeding and cancelling the project.

Additional fixed cost=Optimal profit=1 million

C(\xi )=6*(\xi ^{2}+4)

We can see that firm is incurring a fixed cost of $24 million.

So, a fixed cost of $25 million will make the studio indifferent.

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