how do you total columns that are not adjacent but in the same row?

I saw this previous post but cannot figure it out:

"I want to add up, the first is at G4, the next is N4, then U4 etc etc...
until the last cell is BCZ4. So, every interval space of 6 cells. The values
are all in the same row.

reply: Try this

=SUMPRODUCT((MOD((COLUMN(G4:BCZ4)-COLUMN($F$4)),7)=1)*(G4:BCZ4))"

I would like to: begin with the amount in D7
subtract amount in E7
add amount in H7
provide answer in I7

is this possible? if so, how?

really appreciate your help...will be a very long
spreadsheet and these calculations will be beneficial.

thank you!




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