23. The earnings, dividends, and stock price of Sum Company are expected to grow at 7 percent per year after this year. Sum Company's common stock sells for P23 per share, its last dividend was P200 and the company pay P2.14 at the end of the current year. Sum Company should pay P2.50 otation cost. Using the dividend growth model, what is the expected cost of retained earnings for Sum Company? A. 10.44 percent B. 16.30 percent C. 9.30 percent D. 17.44 percent