NPV = Net present value
What Are NPV and IRR? Net present value (NPV) is the difference between the present value of cash inflows and the present value of cash outflows over a period of time. By contrast, the internal rate of return (IRR) is a calculation used to estimate the profitability of potential investments.


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Note added at 1 hr (2023-06-12 22:58:58 GMT)
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I think the symbol (m) refers to the month, please check with your client about that.

حساب صافي القيمة الحالية (Calculation of Net Present Value)
معدل العائد الداخلي Internal Rate of return

NPV& IRR صافي القيمة الحالية ومعدل العائد الداخلي للاستثمار
https://www.youtube.com/watch?v=E7zl4m7PqeE

https://www.wallstreetmojo.com/npv-examples/



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Note added at 2 hrs (2023-06-12 23:08:22 GMT)
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sorry,
Compounding Intervals = m
You can now figure out this.