31. Corner Books has sales of $687,400, cost of goods sold of $454,200, and a profit margin of 5.5 percent. The balance sheet shows common stock of $324,000 with a par value of $5 a share, and retained earnings of $689,500. What is the price-sales ratio if the market price is $43.20 per share? a. 4.28

b. 12.74

c. 6.12

d. 4.07

e. 14.51