The IRR function needs the following information
IRR(values,guess)
Values is an array or a reference to cells that contain numbers for which you want to calculate the internal rate of return.
Values must contain at least one positive value and one negative value to calculate the internal rate of return.
IRR uses the order of values to interpret the order of cash flows. Be sure to enter your payment and income values in the sequence you want.
If an array or reference argument contains text, logical values, or empty cells, those values are ignored.
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