Answer:
It will take approximately 4.2 years.
Step-by-step explanation:
To calculate the payback period for the auto, we need to determine how many years it will take for the additional gross revenues from delivering prescriptions to cover the cost of the auto.
The initial cost of the auto is $32,000 and the salvage value is $4,400, so the depreciable cost is $27,600 ($32,000 - $4,400).
The additional gross revenues from delivering prescriptions are $32,400 per year, and the cost of these prescriptions to the pharmacy is $25,800 per year, so the net additional revenue per year is $6,600 ($32,400 - $25,800).
To cover the depreciable cost of $27,600, it will take approximately 4.2 years ($27,600 ÷ $6,600 = 4.18).
Therefore, the payback period for the auto is closest to 4.2 years.