'POSTGRESQL SUM a subquery Sylob 5

I am working with Sylob's (an ERP) compiler and I am having troubles summing a subquery.

I want to remove the first column to sum the 3rd and 4rth and GROUP By the 2nd, but if I do so, I can't use my subqueries because they depend on it

Can anyone give me a hand on this ?

Have a nice week

I can't link my code, I don't know how to enter code here

postgresql

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