SUMX filter (value smaller 1) does not find correct results

[RonSon2015]

Hello,

After trying many different formul and search terms I cannot find a solution for the following problem.

I've got a fact table with sales by customer and product. However, it could happen that products are given for free. In this case it should calculate the missed sales (free of charge) by multiplying the quantity with the reference price.

Fact table:

Invoice No.	Customer	Material	Quantity	Sales price per piece	Total sales price	Reference price per piece
1	Alpha	A	4	10	40	10
2	Beta	A	2	0	0	10
3	Gamma	A	10	10	100	10
4	Gamma	B	8	0	0	5

Desired output:

Customer	Total sales	Free of charge
Alpha	40	0
Beta	0	20	(2*10)
Gamma	100	40	(8*5)

My idea which is not working (result on lowest level as well as on aggregated level is wrong):

Missed sales = SUMX(

FILTER ( Fact_Table; Sales price per piece < 1) ;

Quantity * Reference price per piece

)

(smaller 1 because some products are not given at zero but for some cents)

Thanks for any hints and suggestions in advance!

[lbendlin]

see attached.  You didn't mention if you wanted working totals.

[RonSon2015]

Thank you for your effort to create that example in PowerBI. It's a solution but I also need working totals to answer the question: What is the total value of freebies and then to analyze to what customer and what products were given for free.

[lbendlin · Accepted solution]

Here's a modified measure

free of charge 2 = 
var c=SUMMARIZE('Table','Table'[Customer],"free",sumx('Table',if('Table'[Sales price per piece]=0,'Table'[Quantity]*'Table'[Reference price per piece],0)))
return sumx(c,[free])