At December 31, 2020, the available-for-sale debt portfolio for Cheyenne, Inc. is as follows.

Security		Cost		Fair Value		Unrealized Gain (Loss)
A		$28,875		$24,750		$(4,125	)
B		20,625		23,100		2,475
C		37,950		42,075		4,125
Total		$87,450		$89,925		2,475
Previous fair value adjustment balanceDr.						660
Fair value adjustmentDr.						$1,815

On January 20, 2021, Cheyenne, Inc. sold security A for $24,915. The sale proceeds are net of brokerage fees.

a) Prepare the adjusting entry at December 31, 2020, to report the portfolio at fair value

b) Show the balance sheet presentation of the investment-related accounts at December 31, 2020.

c) Prepare the journal entry for the 2021 sale of security A.