[libreoffice-users] how to use sumif with multiple condition and refer to cell in formula

Hi,

I have some, I think not to simple problem in Calc.

I have this table:
A    B    C
3    a    1
4    b    1
5    b    0
7    a    0
5    a    1
7    b    0
0    b    1

How can I totalize in one formula (without use a D column) the values in 
column A, only when the column B="a" and the C=1?

And the another question, which resolve the first problem too, how can I 
refer to a test cell the example in sumif formula:
The correct formula:
=SUMIF(C1:C7;1;A1:A7)

What I want:
=SUMIF(C1:C7;*Cx*+3=1;A1:A7)

where Cx is actually examined cell (C1, C2, C3, ...)

or in this example:
A    B    C
3    1    1
4    0    1
5    1    0
7    0    0
5    1    1
7    0    0
0    0    1

=SUMIF(C1:C7;*AND(Bx, Cx)*;A1:A7)
when Bx=1 and Cx=1, I want to totalize the values in A column.


--
Nagy Ákos



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