Here’s a simple savings calculator.  I was working with some gents in England – they were trying to see if they could show savings for their service .  Without giving away too much information , here’s a solution I provided for them to work with.

Now , I would usually do this with Javascript, but this was a challenge and met the goals they were trying to get: Show the customer how much they could save using their services.

This kind of simple calculator works best when there are a limited number of inputs and options for each input.  It is based on a spreadsheet where every combination has its own line.

Although this is simple , it would still take a lot more time to build, install and maintain a custom JavaScript application.  If the data lends itself to this kind of solution you can avoid all that , and maintenance is as easy as updating a spreadsheet!