Swifty Corporation has the following shareholders equity on December 31, 2021:

Shareholders' equity
Share capital
$10 convertible preferred shares,
10,000 shares authorized, 5000 shares issued		$620000
Common shares, no par value,
200,000 shares authorized, 90000 shares issued		2000000
Total share capital		2620000
Retained earnings		459000
Total shareholders equity		$3079000

If one preferred share is convertible into 10 common shares, how many common shares are issued when 420 preferred shares are converted?

4200

420

4

42