Exercise 17-9 At December 31, 2017, the available-for-sale debt portfolio for Cheyenne, Inc. is as follows. Unrealized Gain (Loss) Security Cost Fair Value $21,000 15,000 27,600 $63,600 $18,000 16,800 30,600 $65,400 $(3,000) 1,800 3,000 1,800 480 $1,320 8 Total Previous fair value adjustment balance-Dr Fair value adjustment-Dr On January 20, 2018, Cheyenne, Inc. sold security A for $18,120. The sale proceeds are net of brokerage fees