Suppose Sam runs a smalI business that manufactures shirts. Assume that the market for shirts is a competitive market, and the market price is $20 per shirt. The following graph shows Sam's total cost curve. Use the blue points (circle symbol) to plot total revenue and the green points (triangle symbol) to plot profit for the first seven shirts that Sam produces, including zero shirts. 200 175 Total Revenue 150 Total Cost 125 Profit 100 50 25 -25 3 4 5 6 7 8 QUANTITY (Shirts) TOTAL COST AND REVENUE (Dollars)

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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Suppose Sam runs a small business that manufactures shirts. Assume that the market for shirts is a competitive market, and the market price is $20
per shirt.
The following graph shows Sam's total cost curve.
Use the blue points (circle symbol) to plot total revenue and the green points (triangle symbol) to plot profit for the first seven shirts that Sam
produces, including zero shirts.
200
175
Total Revenue
150
Total Cost
125
Profit
100
50
-25
3
4
6
7
8
QUANTITY (Shirts)
TOTAL COST AND REVENUE (Dollars)
Transcribed Image Text:Suppose Sam runs a small business that manufactures shirts. Assume that the market for shirts is a competitive market, and the market price is $20 per shirt. The following graph shows Sam's total cost curve. Use the blue points (circle symbol) to plot total revenue and the green points (triangle symbol) to plot profit for the first seven shirts that Sam produces, including zero shirts. 200 175 Total Revenue 150 Total Cost 125 Profit 100 50 -25 3 4 6 7 8 QUANTITY (Shirts) TOTAL COST AND REVENUE (Dollars)
Calculate Sam's marginal revenue and marginal cost for the first seven shirts he produces, and plot them on the following graph. Use the blue points
(circle symbol) to plot marginal revenue and the orange points (square symbol) to plot marginal cost.
(?
40
35
Marginal Revenue
30
25
Marginal Cost
1
2
3
4
5
6
7
8
QUANTITY (Shirts)
Sam's profit is maximized when he produces
shirts. When he does this, the marginal cost of the last shirt he produces is $
, which is
v than the price Sam receives for each shirt he sells. The marginal cost of producing an additional shirt (that is, one more shirt than
would maximize his profit) is $
, which is
than the price Sam receives for each shirt he sells. Therefore, Sam's profit-maximizing
quantity corresponds to the intersection of the
curves. Because Sam is a price taker, this last condition
can also be written as
COSTS AND REVENUE (Dollars per shirt)
Transcribed Image Text:Calculate Sam's marginal revenue and marginal cost for the first seven shirts he produces, and plot them on the following graph. Use the blue points (circle symbol) to plot marginal revenue and the orange points (square symbol) to plot marginal cost. (? 40 35 Marginal Revenue 30 25 Marginal Cost 1 2 3 4 5 6 7 8 QUANTITY (Shirts) Sam's profit is maximized when he produces shirts. When he does this, the marginal cost of the last shirt he produces is $ , which is v than the price Sam receives for each shirt he sells. The marginal cost of producing an additional shirt (that is, one more shirt than would maximize his profit) is $ , which is than the price Sam receives for each shirt he sells. Therefore, Sam's profit-maximizing quantity corresponds to the intersection of the curves. Because Sam is a price taker, this last condition can also be written as COSTS AND REVENUE (Dollars per shirt)
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