I have an Excel table listing rooms, type of windows and how much windows are in that room: Example:
COL-A| COL-B | Col-C
Row1 | Room | Window | Qty
Row2 | A | W1 | 1
Row3 | A | W2 | 1
Row4 | A | W1 | 1
Row5 | B | W1 | 1
Row6 | B | W1 | 1
Row7 | B | W1 | 1
Row8 | B | W1 | 1
...
I need to get a list telling how many Windows of each typ there is in each room:
COL-A | COL-B | Col-C
Row1 | Room | Window | Qty
Row1 | A | W1 | 2
Row1 | A | W2 | 1
Row1 | B | W1 | 4
...
It means I have to add values in Column C (QTY) if the combination of values in Column A and B are the same.
I have tryed all sort of cformula combinations like =SUMIFS(UNIQUE(A2:A100);AND;UNIQUE(B:100)) However without succes.
Any help would be appreciated

