At December 31, 2020, the available-for-sale debt portfolio for Vaughn, Inc. is as follows. Security Cost Fair Value Unrealized Gain (Loss) A $38,500 $33,000 $(5,500) B 27,500 30,800 3,300 C 50,600 56,100 5,500 Total $116,600 $119,900 3,300 Previous fair value adjustment balance-Dr. 880 Fair value adjustment-Dr. $2,420 On January 20, 2021, Vaughn, Inc. sold security A for $33,220. The sale proceeds are net of brokerage fees. Part 1 Prepare the adjusting entry at December 31, 2020, to report the portfolio at fair value. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.)