Pivot Table based on multiple Pivot Tables

I have two pivot tables: [CREDIT TBL] and [EMP TBL]. (see screenshot below)

[CREDIT TBL] is the money I received from clients.
[EMP TBL] is the money I paid employers.

Both source tables ([tbl_clients] and [tbl_emp]) are structured completely differently so I don't see a way to combine them into one pivot table. (Since there is no relationship between them so no primary key to choose)

What I really only need is a third pivot table that would look the same as the ones in the screenshot below but the values should be [CREDIT TBL] - [EMP TBL].
This way, I would see the total profit (income - paying employers).

I can't figure out how to create a third pivot table, based on the two current ones.

Any help would be greatly appreciated.

EXCEL_BDRCSWptN2.png

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