Phantom Stock Calculation (Stock >0 and Sales =0)

[MarkCBB]

Hi there, 
I have a basic table setup:
tblProducts (ProductID)
tblStores (StoreID)
tblData (StoreID, ProductID, Date, SOH, Sales)
tblCalendar (Date)

I am trying to count the line (ProductID & StoreID). That have More than zero SOH for the latest date of data and zero sales over 50 days.

[MarkCBB · Accepted solution]

I was finally able to get this calculation working, by using CROSSJOIN. Other methods were just too slow. 
Here is the measure, hope it is able to help someone else. 

Phantom Stock = 
CALCULATE (
    SUMX (
        CROSSJOIN (
            VALUES ( tblProducts[ArticleCode] ),
            VALUES ( tblStores[StoreCode] )
        ),
        IF (
            [Stock on Hand Latest Date] > 0
                && [Volume Sales Total (X Days)] <= 0,
            [Stock on Hand Latest Date],
            BLANK ()
        )
    )
)

Here are the 2 supporting measures. 

Stock on Hand Latest Date = 
VAR _MaxDate = CALCULATE(MAX(tblCalendar[Date]),ALL(tblCalendar))
RETURN
    CALCULATE (
        [Stock on Hand Total],
        FILTER (
            tblCalendar,
            tblCalendar[Date] = _MaxDate
        )
    )

The Variable called _Days, is just a list of days in weeks, (1 Week = 7, 2 Weeks = 14 etc...)

Volume Sales Total (X Days) = 
VAR _CurrentDate = CALCULATE(MAX(tblCalendar[Date]),ALL(tblCalendar))
VAR _Days = max(sptWeeks[Days])
VAR _StartDate = _CurrentDate - _Days
RETURN
CALCULATE(
    [Volume Sales Total],
    FILTER(
        tblCalendar,
        tblCalendar[Date] > _StartDate && tblCalendar[Date] <= _CurrentDate
    )
)