Let's assume that I have the following table in Excel
A B
Item quantity_sold
A 3
A 4
A 1
B 5
B 2
D 12
C 3
C 7
C 8
and I need to sum up quantity_sold grouped by Item and print the results on the adjacent column only once per group, similar to the following
A B C
Item quantity_sold SUM_by_item_type
A 3 8
A 4
A 1
B 5 7
B 2
D 12 12
C 3 18
C 7
C 8
Is there any way I can achieve this without using Pivot Tables?
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