Following is the stockholders’ equity section of the 2013 Kellogg Corporation balance sheet ($ in millions):

2013 2012 Common stock, $0.25 par value, 1,000,000,000 shares authorized, issued: 419,923,540 shares in 2013 and 419,718,217 shares in 2012 $   105 $   105 Capital in excess of par value 626, 573. Retained earnings 6,749, 5,615. Treasury stock at cost, 57,121,760 shares in 2013 and 58,452,083 shares in 2012 (2,999) (2,943). Accumulated other comprehensive (loss) (936), (946). Total Kellogg Company equity 3,545, 2,404. Noncontrolling interests 62, 61. Total equity $3,607, $2,465

First numbers are 2013, second numbers are 2012

a. At what average price was the common stock issued as of 2013?

b. How many common shares are outstanding at year end 2013?

c. How many shares of treasury stock (net) did Kellogg acquire or retire or sell during 2013?

d. What average price did Kellogg acquire its treasury stock as of year-end 2013?