Answer:
$4,350
Explanation:
The computation of the total amortization expense is shown below:
= Legal costs associated with the patent + unamortized research expenditures ÷ time period × number of months
= $43,000 + $15,000 ÷ 120 months × 9 months
= $58,000 ÷ 120 months × 9 months
= $4,350
The amortization period would be lesser of patent life i.e 20 years or useful life i.e 10 years and 10 years is converted into months i.e 120 months
And, the 9 months is calculated from April 15 to December 31
As we assume that the books are closed on December 31