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1)
A monopoly firm in a small island country produces and supplies to the country. It faces a market demand curve for its products. The demand equation is linear, so is the firm's total cost (TC) function. The following table exhibits the data for Quantity, Price, and TC.

(1) (1) Estimate the demand equation.
[Show the estimated equation.]
(2) (2) Estimate the TC function.
[Show the estimated TC equation.]
(3) (3) What is the profit-maximizing quantity?
[Profit-max quantity is determined at the level where MC = MR. Hence, Derive MC function from the estimated TC function. Derive MR from TR function which is PQ, where P = P(Q). In other words, P is the estimated demand equation expressed by Q. But, since the demand function is linear, the MR function is linear with a twice steeper slope than the demand equation and with the same intercept.]
(4) (4) What is the profit-maximizing price?
[Once the quantity is determined, find the corresponding price at the demand curve.]
(5) (5) What is the monopoly profit? [Profit = TR - TC.]

Q P TC
1 100 11
2 97 19
3 98 31
4 95 39
5 96 51
6 93 59
7 94 71
8 91 79
9 92 91
10 89 99
11 90 111
12 87 119
13 88 131
14 85 139
15 86 151
16 83 159
17 84 171
18 81 179
19 82 191
20 79 199
21 80 211
22 77 219
23 78 231
24 75 239
25 76 251

2)
A manufacturing firm operating in a perfectly-competitive market has the following cost function:
TC = a + b Q + c Q2 + d Q3
The TC data with respect to Q are provided in the table below.

(1) (1) Estimate the TC equation and show the estimated equation.
[a = round up to a whole number (no decimal), b = round up and no decimal, c = round up to the first decimal (one decimal), and d = round up to the first decimal (one decimal)]
(2) (2) What are the equations for AC and MC?
(3) (3) The market price is $637.5. What is the firm's profit-maximizing level of output?
(4) (4) Does the firm make profit or loss? Show either the profit or loss?
(5) (5) The market price changes. At which price will the firm shut down the operation?

TC Q
1780 1
2021 2
2238 3
2435 4
2626 5
2814 6
3013 7
3227 8
3472 9
3750 10
4074 11
4451 12
4893 13
5405 14
6001 15
6684 16
7468 17
8357 18
9366 19
10500 20
11770 21
13182 22
14749 23
16475 24
18375 25

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The expert estimates the TC equation and show the estimated equation.

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Please refer to the attachment.

1)
A monopoly firm in a small island country produces and supplies to the country. It faces a market demand curve for its products. The demand equation is linear, so is the firm's total cost (TC) function. The following table exhibits the data for Quantity, Price, and TC.

(1) Estimate the demand equation.
[Show the estimated equation.]

So demand is P = - Q + 100.04

(2) Estimate the TC function.
[Show the estimated TC equation.]
TC = 10Q + 0.04

(3) What is the profit-maximizing quantity?
[Profit-max quantity is determined at the level where MC = MR. Hence, Derive MC function from the estimated TC function. Derive MR from TR function which is PQ, where P = P(Q). In other words, P is the estimated demand equation expressed by Q. But, since the demand function is ...

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