Help needed with COUNTIF in DAX

[GracieLeeMonroe]

All

Problem: 

I need to allocate the discount to invoice line items, but there are cases when the discount is credited in separate credit memo and has only one invoice line as a result. Then I need to make sure that those lines will be summarized in my column called "AdjustedAmountInvoiceLineItem" using countif function. I tried several DAX commands like COUNT, COUNTA, COUNTROWS in combination with FILTER, ALL, ALLEXCEPT to no avail so far. 

Discount	invoiceNumber	serviceMonth	Sum of Total	AllocatedDiscountperInvoiceLine	AdjustedAmountInvoiceLineItem
-660	12345	04/2021	-660	0	-660
-400	12478	05/2021	4000	-200	3800
-200	12478	05/2021	2000	-50	1950

Right now, the value in the last column is zero, but should be -660 EUR.

So this is my current DAX Command:

AdjustedAmountInvoiceLineItem = IF(AND(Table1[Discount]="Discount", Calculate(COUNT,ALLEXCEPT(Table1, Table1[invoiceNumber], Table1[serviceMonth])>1)),0,Table1[Sum of Total]+Table1[AllocatedDiscountPerInvoiceLine])

But I get this error message:

The syntax for ',' is incorrect. (DAX(IF(AND(Table1[Discount]="Discount",Calculate(COUNT,ALLEXCEPT(Table1[invoiceNumber], Table1[serviceMonth])>1)),0,Table1[Sum of Total]+Table1[AllocatedDiscountPerInvoiceLine]))).

I cannot see the error and I am not sure if this is the correct DAX command at all. 

I appreciate all the help!

Thanks!

GracieLee

[v-cazheng-msft]

Hi @GracieLeeMonroe 

Noticed that you have resolved this issue by yourself. Could  you please kindly mark your solution to help the other members find it more quickly? Thanks in advance!

Best Regards,

Community Support Team _Caiyun

[GracieLeeMonroe · Accepted solution]

All, 

found it, here is the DAX Command I used:

IF(AND(Table1[Discount]="Discount", Calculate(COUNTROWS(Table1),ALLEXCEPT(Table1,Table1[serviceMonth],Table1[invoiceNumber]))>1),0, Table1[Sum of Total]+Table1[AllocatedDiscountPerInvoiceLine])

Have a great day!

Regards

GracieLee