Retained earnings versus new common stock Using the data for a firm shown in the following table, calculate the cost of retained earnings and the cost of new common stock using the constant-growth valuation model. (Click on the icon here in order to copy the contents of the data table below into a spreadsheet.) Underpricing Current market Dividend price per share growth rate $64.00 7% Projected dividend per share next year $3.20 per share Flotation cost per share $2.25 $1.50 a. The cost of retained earnings is [%. (Round to two decimal places.)