Answer:
$411,600
Explanation:
the patent's carrying value on January 1, 2018 was $355,200
its remaining useful life is 8 years or 96 months
patent amortization per month = $355,200 / 96 = $3,700
legal costs increase the patents carrying value by $102,000, which will increase the amortization per month by $102,000 / (96 - 11) = $1,200
the company amortized the patent by $3,700 for 11 months and its December amortization was $3,700 + $1,200 = $4,900
total amortization for the year = ($3,700 x 11) + $4,900 = $45,600
patent's carrying value = ($355,200 + $102,000) - $45,600 = $411,600