In the figure below, Name would be an ideal identifier. 
Definitions:
Payback Period Method
A capital budgeting method that calculates the time required for an investment to generate cash flows to recover its initial cost.
Net Present Value
A method used in capital budgeting to evaluate the profitability of an investment by calculating the difference between the present value of cash inflows and outflows over a period of time.
Internal Rate of Return
A metric used in financial analysis to estimate the profitability of potential investments.
Time Value of Money
The concept that money available today is worth more than the same amount in the future due to its potential earning capacity.
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