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Home/ Questions/Q 3799652
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Editorial Team
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Editorial Team
Asked: May 19, 20262026-05-19T13:46:07+00:00 2026-05-19T13:46:07+00:00

I’m a designer. I have a list of tasks, with hours, and I’ve split

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I’m a designer. I have a list of tasks, with hours, and I’ve split them into milestones. I want to count the number of hours for each milestone.

Here’s a picture:

Excel of design time sheet

In other words: I want to look at the value in the M column, if it’s 1, I want to get the cell across it, then repeat down the rows, and sum the whole lot.

See if you can figure that one out with the least cell wastage! 🙂 (This is Numbers for Mac, so no macros or vbscript or what-have-you.)

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  1. Editorial Team
    Editorial Team
    2026-05-19T13:46:08+00:00Added an answer on May 19, 2026 at 1:46 pm

    In Excel the SUMIF formula can be used.

    Assumption: In picture above, the ‘Hours’ label is in cell A1
    The formula for ‘Milestone 1’ in cell E2 would be:

    =SUMIF($C2:$C11,RIGHT(E1,1),$A2:$A11)
    

    The syntax of the formula is:

    =SUMIF(range, criteria, sum range)
    

    The criteria is determined by using the last character in the ‘Milestone’ heading.

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