Answer:
Present Value of Cash Flows
Exactly when they occur
Expansion Project
Sunk cost is the cost which is already incurred and it is not affected by the decision to accept or reject the project.
Include the value of the warehouse as part of the initial investment in the new project.
Negative Externality
Explanation:
Present value of Cash flows is the discounted cash flows which shows the real worth of the money now which is to be received in future. Sunk costs are not part of the project as they are already incurred. These cost are not included in the calculations of the project cash flows. Negative externality is the undesirable impact due to production and manufacturing plants operations on the environment.