Trying to figure out how to combine multiple formulas for 1 row and 1 column.

For example:

Budget sheet has total Net Income After ALL Expenses (which is the sum of Row 35).

I also need a custom formula for the corresponding Column. This formula needs to subtract values from other cells in the Column and produce the same result as the contents of the sum of Row 35.

I hope I am making sense! Please help Thanks in advance.