Giants Co acquired 3 different patents on 1/1/18. Cost, original grant date and estimated economic life for each patent are:

Patent	Cost	Original Grant Date	Economic Life (@ 1/1/18)
K9	$210,000	1/1/08	7 years
ERA	$720,000	1/1/10	16 years
WHIP	$570,000	1/1/17	15 years

At 12/31/18, recovery tests are performed on the projects associated with the patents. Results are as follows:

Patent	Net Future Cash Flows	Fair Value
K9	$165,000	$144,000
ERA	$695,000	$612,000
WHIP	$515,000	$468,000

At 1/1/19, the remaining economic life of each patent was determined to be 12 more years (through 12/31/30). At 12/31/19, there is no impairment.

** REQUIRED:

1) Determine the following:

a) TOTAL amount of amortization expense reported FYE 12/31/18. 128000 b) TOTAL amount of loss on impairment (if any) reported FYE 12/31/18. 100000 c) TOTAL amount of amortization expense reported FYE 12/31/19. 115000 d) TOTAL carrying value for patents reported at 12/31/19. 1157000

Here are the correct answers, can you please explain how they were computed.