Gannon Company acquired 6,000 shares of its own common stock at $20 per share on February 5, 2006, and sold 3,000 of these shares at $27 per share on August 9, 2007. The market value of Gannon's common stock was $24 per share at December 31, 2006, and $25 per share at December 31, 2007. The cost method is used to record treasury stock transactions. What account(s) should Gannon credit in 2007 to record the sale of 3,000 shares?
a. Treasury Stock for $81,000.
b. Treasury Stock for $60,000 and Paid-in Capital from Treasury Stock for $21,000.
c. Treasury Stock for $60,000 and Retained Earnings for $21,000.
d. Treasury Stock for $72,000 and Retained Earnings for $9,000