Answer:
The total amount capitalized for the patent through March 31, 2018 should be $456,000
Step-by-step explanation:
All the costs incurred to make the asset usable will be capitalized.
The research cost is the sunk cost because it is already been incurred and it does not affect the decision of making the patent.
Hence the capitalized cost can be calculated as follow
Capitalized cost = Legal Fee for registration + Legal fee of successful defense of the patent
Capitalized cost = $151,000 + $305,000
Capitalized cost = $456,000