On January 1, 2020, the stockholders' equity section of Riverbed Corporation shows common stock ($5 par value) $1,500,000; paid-in capital in excess of par $1,010,000; and retained earnings $1,230,000. During the year, the following treasury stock transactions occurred. Mar. 1 Purchased 51,000 shares for cash at $15 per share. July 1 Sold 10,000 treasury shares for cash at $17 per share. Sept. 1 Sold 8,500 treasury shares for cash at $14 per share. (a) Journalize the treasury stock transactions. (Record journal entries in the order presented in the problem, Credit account titles are automatically indented when amount is entered. Do not indent manually.)