Answer:
To calculate the foregone interest in year 4, we need to find the opportunity cost of the market value of the printing press at the end of year 4, which is $24,000.
The opportunity cost is the return that could be earned if the market value of the printing press were invested elsewhere. Since the MARR is 10%, we can use this rate as the opportunity cost.
The foregone interest in year 4 is therefore:
Foregone interest = Market value x MARR
Foregone interest = $24,000 x 0.10
Foregone interest = $2,400
Therefore, the answer is A. $2,400.