Answer:
$215,000
Explanation:
As at 2016
Cost of patent $200,000
Legal and filing fees $50,000
Patent $250,000
Yearly amortization = $250,000/10 = $25,000 (10 years)
As at 2019
Patent $250,000
Less Amortization($25,000*3 years) ($75,000)
Book Value $175,000
Patent (Book Value) $175,000
Add legal fees for an unsuccessful defense of the patent $40,000
Total $215,000
The amount charged to income (expense and loss) in 2019 related to the patent should be $215,000.