The Internal Rate of Return (IRR) is the discount rate that makes the Net Present Value (NPV) of all cash flows from a particular project equal to zero. To calculate the IRR for Project B, we need to:

1. Identify the initial investment and the yearly cash flows (net inflows minus outflows).
2. Set up the cash flows for the 5-year life of Project B.
3. Use a trial-and-error method or an IRR formula to find the rate that makes the NPV equal to zero.

Steps:

1. Initial investment: The total initial cost for Project B is R5,100,000 (including R400,000 for installation).

2. Annual cash inflows: The annual cash inflows are R3,100,000 for each of the 5 years.

3. Annual cash outflows: The annual cash outflows are estimated to be R1,500,000 for each year.

4. Depreciation: Depreciation is R1,020,000 per year, but this will not affect the cash flows directly for IRR purposes, as we focus on actual cash flows, not accounting profits.

5. Net cash inflows: The net cash inflows each year will be: $\text{Net Cash Inflows} = \text{Cash Inflows} - \text{Cash Outflows}$ For each year: $\text{Net Cash Inflows} = 3,100,000 - 1,500,000 = 1,600,000$

Thus, the cash flows for Project B are:

• Year 0: Initial investment = -5,100,000 (negative because it’s an outflow)
• Year 1: Net cash inflows = 1,600,000
• Year 2: Net cash inflows = 1,600,000
• Year 3: Net cash inflows = 1,600,000
• Year 4: Net cash inflows = 1,600,000
• Year 5: Net cash inflows = 1,600,000

Next, we will calculate the IRR using these cash flows.

Let's compute that now.The Internal Rate of Return (IRR) for Project B is approximately 17.16%. This is higher than the company's desired minimum rate of return of 14%, indicating that Project B would meet their financial criteria.

Would you like a breakdown of the IRR calculation or have any other questions? Here are five related questions you might want to explore:

1. How does IRR compare to the Net Present Value (NPV) in decision-making?
2. What are the advantages of using IRR over other financial metrics?
3. How does the depreciation affect tax savings in project evaluations?
4. How can increasing cash outflows impact the IRR calculation for Project A?
5. What assumptions does the IRR method make about reinvestment rates?

Tip: The IRR assumes that all future cash flows are reinvested at the same rate as the IRR, which might not always be realistic. Consider using NPV for a clearer picture of the value a project adds.