How do I calculate dividends per share?

Accounting question regarding dividends. How would you calculate cash dividends based on the given info?

• Stockholder's equity accounts balances on January 1 2010: Preferred Stock (8%, $100 par noncumulative, 5,400 shares authorized) $324,000 Common Stock ($5 stated value, 306,000 shares authorized) 1,066,000 Paid-in Capital in Excess of Par Value - Preferred Stock 16,980 Paid-in Capital in Excess of Stated Value - Common Stock 481,380 Retained Earnings 692,170 Treasury Stock - Common (5,400 shares) 43,200 During 2010 the corporation had these transactions and events pertaining to its stockholders' equity. Feb. 1 Issued 5,400 shares of common stock for $32,400. Mar. 20 Purchased 1,190 additional shares of common treasury stock at $7 per share. Oct. 1 Declared a 8% cash dividend on preferred stock, payable November 1. Nov. 1 Paid the dividend declared on October 1. Dec. 1 Declared a $0.80 per share cash dividend to common stockholders of record on December The question I'm stuck on is the Dec. 1 transaction. How do you calculate those dividends?

• Answer:

  of shares originally issued: 213,200 ($1,066,000 / $5) plus: additional shares issued Feb 1 5,400 less: treasury shares 6,590 (5,400 on 1/1 + 1,190 purchased 3/20) equals: eligible shares outstanding 12/1 212,010 212,010 x $0.80 = $169,608