Morrison Tobacco Co. just paid a dividend of $3.11 per share. The company is in a state of decline, decreasing its dividend by 20 percent next year, 15% the year after that, 10% the year following until it reaches the industry average of -5 percent dividend growth, after which the company will keep a constant growth rate forever. If the market price of Morrison stock is $21.55, what is the required return on the shares?