Add substraction feature to income

[mptr8956]

Support guidelines

• [x] My request extends the functionality of Ocular in a meaningful way.
• [x] I've used the search and this has not been requested before.

Description

I want to extract in the fields (sum is available already), as i for example get travel allowance where one part is charging costs that i want to display separate.

Solution

see above

What are alternatives?

No response

Additional context

No response