ent CALCULATOR FULL SCREEN Exercise 15-10 For a recent 2-year period, the balance sheet of Cullumber Company showed the following stockholders' equity data at December 31 (in millions). Additional paid-in capital 970 830 Common stock 660 651 Retained earnings 7,200 5,220 Treasury stock 1,702 884 Total stockholders' equity $7,128 $5,817 Common stock shares issued 220 217 500 500 Common stock shares authorized Treasury stock shares 26 (a) Answer the following questions. (1) what is the par value of the common stock? (Round par value to 2 decinal places, eg s3.15 Par value of common stock (2) what is the cost per share of treasury stock at December 31, 2017, and at December 31, 2016? ember 31, 20 Cost per share of Treasury stock