Refer to the graph to the right of the costs for a perfectly competitive firm. Which of the following best represents profit per unit of output? MC ATC O A. the shaded rectangle B. the market price O c. the distance between points A and B OD. None of the above. Which of the following best represents total profit? Price D-MR B O A. the distance between points A and B OB. the shaded rectangle OC. the market price OD. None of the above. Q Quantity Which demand curve in the graph to the right is associated with the shutdown point for this perfectly competitive firm? MC O A D OB. D OC. D. ODD ATC AVC Price and cost DA MRA Dy - MR, D2 - MR2 DMR Q1 Q2 Q304 Quantity