Answer: c) $86,400
Step-by-step explanation:
Depreciation on an asset reduces the amount of taxes that need to be paid and this is the main reason assets are depreciated.
If Carlin is going to ignore income taxes then there is no need to account for the impact of depreciation on the asset when calculating its present value.
The present value will therefore be the same as the amount calculated by the assistant at $86,400.