Financial
is a [Rust] (https://www.rust-lang.org/) cargo that contains collection of finance calculations memicking some of [Excel Financial Functions] (https://support.microsoft.com/en-us/office/financial-functions-reference-5658d81e-6035-4f24-89c1-fbf124c2b1d8) interface.
It supports both periodic and scheduled computation for [IRR] (https://en.wikipedia.org/wiki/Internal_rate_of_return) and [NPV] (https://en.wikipedia.org/wiki/Net_present_value).