Answer:
The opportunity cost of each pipe and sunk cost of each pipe is $ 8 and $6 respectively.
Step-by-step explanation:
Opportunity cost: The opportunity cost is that cost which gives the best alternatives options.
Sunk cost: The sunk cost is that cost which is incurred in the past and hence, not recovered in the future.
So, in the given question, the opportunity cost is $8 per pipe as it reflects new current price whereas, the sunk cost is $6 per pipe ($8 per pipe - $2 per pipe) that cannot be recovered in the future