Hi, I'm new here

I'm working on a Fringe Benefits sheet and having some problem entering formula calculations.

In the Word document I was given, there are columns called "In Debt By -" and "In Credit By +" (see attached image). I want to transfer this information into Excel.

The problem I have is (and don't know a formula for) if the running total value is positive, it should only be displayed in the "In Credit By +" column, and if the running total value is a negative value, it should only be displayed in the "In Debit By -".

Does anyone have a formula I can use for this calculation? Thank you very much

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