Dynamic rolling sum in excel
How can I calculate the rolling sum of a column based on another column?
Example:
Input data are the first 3 columns in the below table. The result column that I am trying to get is highlighted in green. I want to get the dynamic sum of 'Daily sales' based on the corresponding 'No of days' given.
Solution
This formula worked. Add the 'OFFSET' function inside the 'SUM' function to input the dynamic array.
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