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...Sheet npv calculator add custom cash flows or create autogenerated flow series uniform gradient and exponential copy vertex llc you can delete insert new columns but make sure the sum column is correct after making changes net present value for each calculated along with total edit lightblue cells irr function used to calculate overall internal rate of return it requires an initial guess discount i type a g exp grad none eo periods period label xnpv xirr this worksheet uses schedule that are not necessarily periodic analysis toolpak addin see help on assumes days in year dates do need be order have multiple same date err using dynamic ranges exact range array formula...