Webhook | API Add Record - Formulas

Hello everyone,

I am trying to make an API Call that, when triggered, will add an apartment record with the same values of the current one with the sole difference of the Monthly Rent be negative - for example.

You guys can help me to discover what i have been doing wrong?

Example:

API_AddRecord
<qdbapi>
<usertoken>######</usertoken>
<field fid="6">[Unit #]</field>
<field fid="9">[# of Bathrooms]</field>
<field fid="10">[Monthly Rent]*-1</field>
</qdbapi>

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Pedro Sampaio
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