Number Formating based on List not Line Item

It would be great to be able to set number formatting based on a list rather than a line item.  The list format would be applied in every module/line item used where the line item format is number.

In our modules, we have a list with three members: Amount, Units, and Average Wholesale Price (AWP).  It would be great to always see Amount and AWP as dollars and Units as a standard number.  

We also have use cases where certain line items will always be percentages.