Negating string in mongodb

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I’m working with node and mongo 5. I am trying to select the field “TOTAL VALUE” with a value other than ‘$0.00’ . I think I’m able to select for ‘$0.00’ with:

{'TOTAL DUE': {$regex: /$0./}}

as in the screenshot. However trying to negate this with:

{'TOTAL DUE': {$not :{$regex: /$0./}}}

gives the entire data set (including when TOTAL DUE does not exist),

How can I get this working?