Consider a price-taking firm that has total fixed cost of $500 and faces a market-determined price of $10 per unit for its output. The wage rate is $175 per unit of labor, the only variable input. Using the following table, fill in the columns and answer the question below.
(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
Units of labor |
Output |
Marginal product |
Marginal revenue product |
Marginal cost |
Profit |
1 |
10 |
||||
2 |
30 |
||||
3 |
60 |
||||
4 |
100 |
||||
5 |
150 |
||||
6 |
190 |
||||
7 |
210 |
||||
8 |
225 |
||||
9 |
235 |
||||
10 |
240 |
The manager should produce _____ units of output to maximize profit.
Marginal product is the change in the total output due to employment of additional unit of resource i.e. in this problem an additional unit of labor.
Revenue is the product of price and quantity sold i.e. Revenue = Price × Quantity sold
Marginal revenue product is the change in the total revenue due to employment of an additional unit of input i.e. in this case an additional unit of labor.
Total cost = Fixed cost + variable cost
Variable cost = Units of labor × wage rate per labor
Profit = Revenue - total cost
Units of labor | Output | Marginal product | Marginal revenue product | Marginal cost | Profit |
1 | 10 | _ | _ | _ | -$575 |
2 | 30 | 20 | $200 | $175 | -$550 |
3 | 60 | 30 | $300 | $175 | -$425 |
4 | 100 | 40 | $400 | $175 | -$200 |
5 | 150 | 50 | $500 | $175 | $125 |
6 | 190 | 40 | $400 | $175 | $350 |
7 | 210 | 20 | $200 | $175 | $375 |
8 | 225 | 15 | $150 | $175 | $350 |
9 | 235 | 10 | $100 | $175 | $275 |
10 | 240 | 5 | $50 | $175 | $150 |
The calculation related to the above table is shown as follows:-
Units of labor | Output | Marginal product | Revenue | Marginal revenue product | Total cost | Marginal cost | Profit |
1 | 10 | 10 × $10 = $100 | _ | $675 | _ | $100 - $675 = - $ 575 | |
2 | 30 | 30-10 = 20 | 30 × $10 = $300 | $300 - $100 = $200 | $850 | 850 - 675 = 175 | $300 - $850 = - $ 550 |
3 | 60 | 60 - 30 = 30 | 60 × $10 = $600 | $600 - $300 = $300 | $1,025 | 1025 - 850 = 175 | $600 - $1025 = -$425 |
4 | 100 | 100 - 60 = 40 | 100 × $10 = $1000 | $1000 - $600 = $400 | $1,200 | 1200 - 1025 = 175 | $1000 - $1200 = -$200 |
5 | 150 | 150 - 100 = 50 | 150 × $10 = $1500 | $1500 - $1000 = $500 | $1,375 | 1375 - 1200 = 175 | $1500 - $1375 = $125 |
6 | 190 | 190 - 150 = 40 | 190 × $10 = $1900 | $1900 - $1500 = $400 | $1,550 | 1550 - 1375 = 175 | $1900 - $1550 = $350 |
7 | 210 | 210 - 190 = 20 | 210 × $10 = $2100 | $2100 - $1900 = $200 | $1,725 | 1725 - 1550 = 175 | $2100 - $1725 = $375 |
8 | 225 | 225 - 210 = 15 | 225 × $10 = $2250 | $2250 - $2100 = $150 | $1,900 | 1900 - 1725 = 175 | $2250 - $1900 = $350 |
9 | 235 | 235 - 225 = 10 | 235 × $10 = $2350 | $2350 - $2250 = $ 100 | $2,075 | 2075 - 1900 = 175 | $2350 - $2075 = $275 |
10 | 240 | 240 - 235 = 5 | 240 × $10 = $2400 | $2400 - $2350 = $50 | $2,250 | 2250 - 2075 = 175 | $2400 - $2250 = $150 |
The manager should produce 210 units of output to maximize the profit
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