Answer:
$80,875
Step-by-step explanation:
The computation of the net present value or net benefit is shown below: 
= Present value of all yearly cash inflows after applying discount factor - initial investment
where, 
The Present value would be
= Additional amount × PVIFA for 4 years at 13% 
= $750,000 × 2.9745
= $2,230,875
Refer to the PVIFA table
And, the initial investment is $2,150,000
Now put these values to the above formula 
So, the value would equal to 
= $2,230,875 - $2,150,000
= $80,875