Excel-在X列中查找最后一个相同的值，并将Y列添加到当前单元格

Question

I have a sheet that includes (3) different sources of information, where the source is determined in ColumnA, MoneyOut = ColumnB, MoneyIn = ColumnC, and SourceTotal = ColumnD.

When working with a current row, how can I find the last row in which ColumnA = CurrentRowColumnA[Value], and sum(PrevColumnB[Value]+PrevColumnC[Value]) to CurrentRowColumnD[Value].

Ex:

A1 = Source1
B1 = 200
C1 = 200
D1 = 400

A2 = Source2
B2 = 300
C2 = 200
D2 = 500

A3 = Source1
B3 = 200
C3 = 600
D3 = 1200 (D1 + sum(B3+C3))

How can I write a function to do this continuous addition without having to do a different sumifs for each row?

I've tried: Assuming I'm on D4...

=SUM(IF(A:A=$A4, B4+C4))+IF($A3=$A4, D3)

Which will work for the first few, but once there is another source, this formula doesn't work.

Should I be using an OFFSET() function?

Answer 1

Formula:

=SUMIF($A$1:$A1,$A1,$B$1:$B1)+SUMIF($A$1:$A1,$A1,$C$1:$C1)

Use this in your example sheet to get the result you want.