How do I solve this? Do I take into consideration how much they paid to buy it back?

Watkins, Inc. paid $48,000 to buy back 9,000 shares of its $1 par value common stock.

This stock was sold later at a selling price of $6 per share. The entry to record the sale

includes a:

a. debit to Retained Earnings for $48,000.

b. credit to Paid-in Capital from Treasury Stock for $6,000.

c. debit to Paid-in Capital from Treasury Stock for $45,000.

d. credit to Common Stock for $6,000.