Final answer:
The profitability index of Project D is 1.85 and of Project E is 1.62. Using incremental cash flows, the profitability-index is 1.37, indicating that Project D is the better choice.
Step-by-step explanation:
To calculate the profitability index for each project, we can use the formula: Profitability Index (PI) = (Present Value of Future Cash Flows) / (Initial Investment).
Given an opportunity cost of capital of 8%, we first calculate the present value of future cash flows for projects D and E. We can do this using the formula PV = C1 / (1 + r), where C1 is the cash flow in period 1, and r is the rate.
For Project D:
PV = 21,800 / (1 + 0.08) = 21,800 / 1.08 = $20,185.19
PI = 20,185.19 / 10,900 = 1.85
For Project E:
PV = 36,575 / (1 + 0.08) = 36,575 / 1.08 = $33,873.15
PI = 33,873.15 / 20,900 = 1.62
To calculate the profitability-index using the incremental cash flows, we need to find the difference in cash flows between Project E and Project D:
Incremental Cash Flow (C1) = 36,575 - 21,800 = 14,775
Incremental Investment (C0) = 20,900 - 10,900 = 10,000
PV of Incremental Cash Flow = 14,775 / 1.08 = $13,676.85
Incremental PI = 13,676.85 / 10,000 = 1.37
Based on the incremental profitability index, we should choose Project D, as its PI is higher than Project E's PI when we compare the incremental investment and cash flows.