To calculate the net present value (NPV) of Jane's investment, we need to discount each cash flow to its present value and then sum them up.
Assuming a discount rate of 10%, we can calculate the present value of each cash flow as follows:
Year 1: PV = R610,000 / (1 + 0.10)^1 = R610,000 / 1.10 = R554,545.45
Year 2: PV = R500,000 / (1 + 0.10)^2 = R500,000 / 1.21 = R413,223.14
Year 3: PV = R100,000 / (1 + 0.10)^3 = R100,000 / 1.331 = R75,019.88
Year 4: PV = R800,000 / (1 + 0.10)^4 = R800,000 / 1.4641 = R546,448.09
Year 5: PV = R750,000 / (1 + 0.10)^5 = R750,000 / 1.61051 = R465,116.28
Now, we can sum up the present values of all the cash flows:
NPV = R554,545.45 + R413,223.14 + R75,019.88 + R546,448.09 + R465,116.28
NPV = R2,054,352.84
Therefore, the net present value (NPV) of Jane's investment is R2,054,352.84.