Questions:
To sum the third column (numbers o companies) I’ve used this
=SUM(1/COUNTIF(Names;Names))
Names is name of array in C column and CTRL+SHIFT+ENTER and it works perfectly.
Now I’d like to sum earnings but only for each company once and with the latest data. For example, the result shoud be like this
=C4+C6+C7+C8+C9+C10
(93)
Thanks
A B C D
1 # company earnings date
2 1 ISB 12 10/11/2011
3 2 DTN 15 11/11/2011
4 3 ABC 13 12/11/2011
5 4 ISB 17 13/11/2011
6 5 RTV 18 14/11/2011
7 6 DTN 22 15/11/2011
8 7 PVS 11 16/11/2011
9 8 ISB 19 17/11/2011
10 9 ANH 10 18/11/2011
Sum 6 93
How to&Answers:
Assuming ascending dates, you could try with CTRL+SHIFT+ENTER in C11:
=SUM((MAX(A2:A10)-MATCH(B2:B10,LOOKUP(MAX(A2:A10)-A2:A10,A2:A10-1,B2:B10),0)=A2:A10-1)*C2:C10)
Answer：
I’d suggest using a helper column as the easiest approach. In E2 use this formula
=IF(COUNTIF(B2:B$1000,B2)=1,C2,"")
and copy down the column. Now sum column D for the required answer.
Note that the above formula assumes 1000 rows of data maximum, increase if required.
Tags: date, excelexcel
