The difference between the current value of cash inflows and withdrawals over a period of time is known as net present value (NPV).
A set of cash flows is said to have a net present value or net present worth if they occur at diverse times. The present value of a cash flow depends on how long it will be before it occurs. Another element is the discount rate. The temporal value of money is considered by NPV.
NPV = Cash flow ÷ (1 + i)^t – initial investment.
NPV = Today's value of the expected cash flows − Today's value of invested cash.
ROI = (Total benefits – total costs) ÷ total costs.
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