Implement PDURATION

[jcoliz]

As described here https://support.microsoft.com/en-us/office/pduration-function-44f33460-5be5-4c90-b857-22308892adaf

Description

Returns the number of periods required by an investment to reach a specified value.

Syntax

PDURATION(rate, pv, fv)

The PDURATION function syntax has the following arguments.

• Rate Required. Rate is the interest rate per period.
• Pv Required. Pv is the present value of the investment.
• Fv Required. Fv is the desired future value of the investment.