At December 31, 2017, the available-for-sale debt portfolio for Cheyenne, Inc. is as follows. Security Cost Fair Value Unrealized Gain (Loss) A $21,000 $18,000 $(3,000 ) B 15,000 16,800 1,800 C 27,600 30,600 3,000 Total $63,600 $65,400 1,800 Previous fair value adjustment balanceDr. 480 Fair value adjustmentDr. $1,320 On January 20, 2018, Cheyenne, Inc. sold security A for $18,120. The sale proceeds are net of brokerage fees.

Prepare the adjusting entry at December 31, 2017, to report the portfolio at fair value.

Show the balance sheet presentation of the investment-related accounts at December 31, 2017.