Reputation: 137
I'd like some help writing this excel formula.
I'm trying to calculate the weighted mean of term payments accordingly to their percentage of use but I'm failing on the last part of the logic expression.
=IF(OR(B2>0,B3>0,B4>0,B5>0),(SUMIF(B2:B5,">=1",D2:D5))/(SUM(C2:C5)),0)
%[B] days[C] weighted mean[D=BxC]
30 1 30
70 30 2100
0 60 0
0 90 0
total 68.70967742
What I'd like to do is sum all lines in [D], if the percentage of [B] is >=1. Then I want to divide this by the sum of the days in [C] if their corresponding cell in [B] is >=1
So in this example the answer would be 68.70967742 --- [(30x1)+(70x30)]/(1+30). What I came up with returns 11.7679558.
Thanks
Upvotes: 3
Views: 230
Reputation: 12113
When calculating weighted averages, you'll find SUMPRODUCT
is very useful!
=SUMPRODUCT($B$1:$B$4,$C$1:$C$4)/SUMIF($B$1:$B$4,">0",$C$1:$C$4)
This returned 68.7096774
as required.
Upvotes: 2