Answer:
$250,000
Step-by-step explanation:
Since the purchase cost of an old equipment is already incurred and it does not have any kind of impact in decision making so this cost would be considered as the sunk cost i.e. $250,000
The operating cost of old & new equipment would be relevant for calculating the annual cost savings and the current selling value of the old equipment would also be relevant as salvage value
Therefore $250,000 would be considered