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Michael1957's avatar
Michael1957
Copper Contributor
Sep 29, 2021
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Excel

I have numbers in columns a, b & c.  In column d I have a formula that adds up the three numbers to the left.  I need to be able to insert a blank column at column D, insert a new number into column ...
  • HansVogelaar's avatar
    Sep 29, 2021

    Michael1957 

    In D2:

    =SUM(OFFSET(D2,0,-3,1,3))

    or

    =SUM(INDEX(2:2,COLUMN()-3):INDEX(2:2,COLUMN()-1))

    Fill down.

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