On January 1, 2016, ATM Corporation acquired all of the common stock of ZED Company for $300,000. On that date, ZED's identifiable net assets had a fair value of $250,000. The assets acquired in the purchase of ZED are considered to be a separate reporting unit of ATM Corporation. The carrying value of ZED's investment at December 31, 2016, is $310,000. The fair value of the net assets (excluding goodwill) at that date is $220,000 and the fair value of the reporting unit is determined to be 260,000.

Required:

1) Explain how goodwill is tested for impairment for a reporting unit.

2) Determine the amount, if any, of impairment loss to be recognized at December 31, 2016.