Hi, Kelvin.

Thanks for reaching out to us.

Apology for a delayed response time.

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We are truly sorry to disappoint you, but it is not possible to use a calculation function from one table, and to pass it to another table.

And it is also not possible to combine a calculation function if you try with a Formula based Column, as well,

so at this time we do not have a working solution to provide for this use-case, unfortunately.

But you can make a development suggestion and our devs will do their best to add this in the future.

Please feel free to search on our suggestions page, 

 to see if someone may be already suggested this feature. If you can't see it, feel free to add your suggestion there,  and as more people vote, the feature will move higher on the priority list.

You can certainly follow our changeLog page if you'd like ( it is also available in the plugin dashboard), where we state any changes/new features/bug fixes during updates;

and our newsletter, so you're informed about new features, bug fixes, freebies, etc.

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If you have coding skills and wish to try to make a custom solution now,

you can check out our available hooks for Developers on this documentation and see if you can find any hook that might help.

Please be advised that custom solutions with hooks are not included in our support.

You can also research resources such as Stack Overflow to see if any other user perhaps found a workaround.

( We do like to give examples for certain solutions, but for this use-case, we, unfortunately, don't have anything yet)