3. Profit maximization using total cost and total revenue curves Suppose Sam runs a small business that manufactures shirts. Assume that the market for shirts is a perfectly 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.

The graph below summarizes the demand and costs for a firm that operates in a perfectly competitive market. Instructions: Use the nearest whole numbers on the graph when calculating numerical responses below. " A graph summarizes the demand and costs for a firm that operates in a perfectly competitive market.""The horizontal axis labeled quantity ranges from 0 to 11 in increments of 1. The vertical axis labeled dollar ranges from 0 to 48 in increments of 4. A horizontal line labeled D-superscript f = M R enters the quadrant through the point (0, 28). An upward-facing curve labeled M C begins at the point (0.5, 20) goes down to the right with decreasing steepness to a low point at (3.5, 8) then goes up to the right with increasing steepness to end at the point (8, 40). A second upward-facing curve labeled A V C begins at the point (0.5, 22) goes down to the right with decreasing steepness to a low point at (5, 12) then goes up to the right with increasing steepness to end at the…

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Suppose Amari operates a handicraft pop-up retail shop that sells phone cases. Assume a perfectly competitive market structure for phone cases with a market price equal to $20 per phone case. The following graph shows Amari's total cost curve. Use the blue points (circle symbol) to plot total revenue and the green points (triangle symbol) to plot profit for phone cases for quantities zero through seven (including zero and seven) that Amari produces. TOTAL COST AND REVENUE (Dollars) 200 150 125 100 75 50 25 0 0 O Search Total Cost 20 Total Revenue Profit C Ccc U

A firm is selling apples is profit-maximizing, but they're in a constant cost industry. The industry is perfectly competitive and currently in long-run equilibrium.  Assume apples are a normal good and consumer income falls, and the firm continues to produce.  1. Illustrate the decrease in income in the short run with a cost curves graph. Make sure to highlight the area of loss.

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A firm sells 1,000 units per week. Suppose the average variable cost is $15, and the average cost is $55. In the short run, the break-even price is:___?_____.   . In the long run, the break-even price is    .   Suppose the firm charges a price of $5 per unit. Use the following table to indicate whether the firm will shut down or continue to produce in the short run and the long run. Time Continue to Produce Shut Down Short Run          ?    ?   Long Run            ?     ?

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11. Profit maximization using total cost and total revenue curves Suppose Hubert runs a small business that manufactures teddy bears. Assume that the market for teddy bears is a competitive market, and the market price is $20 per teddy bear. The following graph shows Hubert's total cost curve. Use the blue points (circle symbol) to plot total revenue and the green points (triangle symbol) to plot profit for teddy bears quantities zero through seven (inclusive) that Hubert produces. 200 175 Total Revenue 150 125 Total Cost Profit 100 75 50 25 -25 3 QUANTITY (Teddy bears) 1 2 5 7 8 TOTAL COST AND REVENUE (Dollars)