please check work and provide a detailed explanation if wrong

The shareholders' equity section of ACCUSTART Corporation's statement of financial position at December 31 is presented here. ACCUSTART CORPORATION Statement of Financial Position (partial) Shareholders' equity Contributed capital $5 Preferred shares, cumulative, 10,000 authorized, 6,200 shares issued $620,000 Common shares, 750,000 authorized, 555,000 shares issued 2,164,500 Contributed surplus 93,000 Total contributed capital 2,877,500 Retained earnings 1,095,000 Total shareholders' equity $3,972,500 From your review of the shareholders' equity section above, answer the following questions. What is the average cost of the common shares? (Round the answer to 2 decimal places, e.g. 2.50.) Average Cost 3.90 per share What is the average cost of the preferred shares? Average Cost 100 per share LINK TO TEXT LINK TO TEXT Calculate the annual total dividend for preferred shares. Annual Dividend LINK TO XT LINK T XT If dividends of $16,200 were in arrears on preferred shares, what would be the balance reported for retained earnings? Retained Earnings 1,095,000 LINK TO TEXT LINK T XT