Plugin request: Calculator - input amount, output your plan/benefits

Hi all! The website of a foundation I am working on needs a calculator widget. Does anybody have a good recommendation?

-- In more detail --

The foundation helps people with a distance to the labour market, take the final step a job. They finance stuff like bikes, laptops and short courses. They money needed is sponsored by companies looking to make an impact. Depending on how much money they spend, they get more benefits in return (social media attention, reporting) and their impact grows.

The need
Currently we use a pricing table (see below), but it would be clearer if somebody can input 'x amount', and the output changes: i.e. '# of people with a job, # impact stories a year'

So far I have only found calculator widgets that work the other way around: 'input what you want, and the price is calculated'

Any tips would be greatly appreciated!