Final answer:
To determine whether the old machine should be replaced, we need to calculate the relevant cash flows at different time points, considering the income tax rate. By comparing the undiscounted net cash flow of keeping the existing machine versus replacing it with the new machine, we can make the decision.
Step-by-step explanation:
In order to determine the relevant cash flows, we need to consider the after-tax effects of both keeping the existing machine and purchasing the new machine.
- Cash flows at time 0: For the existing machine, there are no cash flows since it has already been purchased. For the new machine, the initial cash outflow is the cost of the machine. We need to determine the after-tax cost by considering the income tax rate.
- Cash inflows each year of project operation: For each year (1-5), we need to calculate the after-tax cash inflow based on the project's estimated revenue and expenses, considering the income tax rate.
- Cash inflow at the end of the project's life: At the end of the project's life (December 31, 2026), we need to determine the after-tax cash inflow from selling the machine, considering the income tax rate.
Undiscounted net cash flow: If the undiscounted net cash flow of the new machine is higher, it would indicate that the old machine should be replaced.