Required information [The following information applies to the questions displayed below.] The stockholders' equity section of The Seventies Shop is presented here. THE SEVENTIES SHOP Balance Sheet (partial) ($ in thousands) Stockholders' equity: Preferred stock, $50 par value Common stock, $5 par value Additional paid-in capital Total paid-in capital Retained earnings Treasury stock Total stockholders' equity $ 0 12,000 21,600 33,600 45,000 (2,100) $76,500 Based on the stockholders' equity section of The Seventies Shop, answer the following questions. Remember that all amounts are presented in thousands. Required: 1. How many shares of preferred stock have been issued? (Enter your answer in total number of shares, not in thousands.) Number of shares