what is return on common stockholder's equity? I just need that

Ratios from Comparative and Common-Size Data following financial statements for Vega Company. During the year, management obtained additional bond financing to enlarge its production facilities. The plant Consider the addition produced a new high-margin product, which is supposed to improve the average rate of gross profit and return on sales. As a potential investor, you decide to analyze the financial statements: VEGA COMPANY Balance Sheets usands of Dollars Dec. 31, 2013 Dec. 31, 2012 Assets Cash S21,000 $16100 Accounts receivable (net) 39,000 21,400 Inventory 05.000 72,000 Prepaid expenses 500 463,500 427,500 Plant and other assets (net) S630,000 $540,000 Total Assets Liabilities and Stockholders Equity abilities $77,000 $46,000 Curren 9% Bonds payable BB,500 51,000 8% Preferred stock, $50 Par Value 61,000 61,000 Common stock, $10 Par Value 226,000 226.000 B2,500 61,000 Retained earnings $630,000 $540,000 Total Liabilities and Stockholders Equity