Help devoliping the best way to consolidate a Balance Sheet

[simaotc]

Hello dear community,

I have a very big table with all financial movements, and if it's a movement between companys of the same group, I have a column named interco that marks the movement as "Company A - Company B".

When I select all movements from the column A, and column B less "Company A- Company B" I should obtain the ideal result, but due to some mismarked movements or other things, I have smalll diferences.

So my goal is to calculate the balance, and then the excess/defit in EBITDA should became the opposit or a cost or a revenue:

Date	Cat	Value	Company	InterCom
01/10/2023	Sales	10	A	A-B
01/10/2023	Cost	-10	B	A-B
01/10/2023	Sales	5	A	A-B

As you can see, here you have an increase in sales, so If I select only company A or company B, I don't want to change anything but if I select the interco, I should add a row with the oposite signal e this case a cost in the company B.

I know it's quite confused but any suggestion is super apperciated