I am looking for a commodity component - there are TONS of mortgage, annuity and investment calculators that do what I want. Also, the calculations for NPV are very well-known.
I want to be able to embed a widget on a web page that takes a list of N cashflows and calculates the NPV of a selected subset of those cash flows projected over X period of time, eroded by an inflation rate of Y% over that same period and added to an asset initially purchased for Y and also eroded by Y% over that same X period.
There needs to be a database (list of values) driving the logic of this widget, so a means of creating and maintaining that list needs to be a part of the solution (CSV upload seems appropriate, or at least a CUT&PASTE of delimited date/value pairs in the format YYYY-MM-DD,N,NNN,[login to view URL])
What I need most of all is the ability to "skin" the component, so it fits within any website with a customizable "look and feel" and a minimum of re-programming.
An example of a very bare-bones interface can be found at:
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Please let me know how much / how long
have updated the interface to reflect the need for an inception date (for discounting purposes) and also the need for a list of DATE, VALUE pairs to drive the calculations.
Please view updated interface at