Final answer:
The IRR for the investment is calculated by setting the NPV equation to zero and solving for the discount rate. The IRR must exceed the MARR of 20% for the investment to be considered acceptable. The IRR in decimal form would be expressed as a decimal, such as 0.20 for a 20% rate.
Step-by-step explanation:
To calculate the Internal Rate of Return (IRR) for the investment in the equipment, we need to consider the initial investment, the annual revenues, and the annual operating and maintenance costs over the 10-year lifespan. The net annual cash flow can be calculated by subtracting the annual costs from the annual revenues.
The initial investment (outflow) is Php 1,500,000. The annual revenue is Php 400,000, and the annual cost is Php 50,000, which gives us a net annual cash flow (inflow) of Php 350,000 (Php 400,000 - Php 50,000).
To find the IRR, we would set up the equation for the Net Present Value (NPV) equal to zero and solve for the discount rate that satisfies this equation. However, the computation of IRR is complex and typically requires financial calculators or spreadsheets.
After calculating the IRR, we compare it against the Minimum Attractive Rate of Return (MARR). If the IRR exceeds the MARR of 20%, the investment is considered acceptable. In contrast, if it's below, the investment should be reconsidered.
The IRR in decimal form would be the rate expressed as a decimal rather than a percentage (e.g., 0.20 for a 20% IRR).