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	$	0
Common stock, $5 par value		17,500
Additional paid-in capital		70,000
Total paid-in capital		87,500
Retained earnings		50,500
Treasury stock		(3,200	)
Total stockholders' equity	$	134,800

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.)