Answer:
$3,800,000
Step-by-step explanation:
The computation of amortization is shown below:-
Purchase commitment of $200,000 is treated as the residual value of the patent
Amortization = Acquired vale of patent - the residual value of the patent
= $4,000,000 - $200,000
= $3,800,000
Therefore for computing the amortization we simply subtract the residual value of the patent from an acquired value of patent.