Feature request: allow for currency units other than USD

Feature request: allow for currency units other than USD

The currency units in H2I are assumed to be in USD, but in the code (most anyway) the input could be in any currency units and everything should work just fine as long as all the currency inputs are consistent. We have run into a case where we are using H2I for international collaboration (IEA Task 50) and the code returning USD is confusing, even though we used all Euros in the inputs.

Proposed solution

It would be nice to be able to specify the currency units and have all currency units and reports in H2I update accordingly.

I recognize this could get complicated with cost models that have fixed USD outputs, but I think the user could also specify an exchange rate to be used where necessary.

Alternatives considered

Right now we are just working with our knowledge that we can put any currency input we want (for our given cost models) and the output will be the same, even though the output says USD.

Additional context

Start by locating where H2I labels currency outputs as USD, where currency inputs enter cost models, and where reports are generated. Clarify supported currency units, report behavior, and exchange-rate handling before implementation; done means inputs and outputs use an explicitly selected currency without misleading USD labels.