count new customers that bought something

[Sjon_1791]

All,

I have this dax formula from QQUBE. But it is counting all new customers, but i want to see the ammount of customers that bought something.

If i add a visual filter, it keeps the same number of customers. 

How do i add a filter (sales values [sales values, line sales order orginal amount])

Count of New Customers = 
    COUNTROWS (
        FILTER (
            CALCULATETABLE (
                ADDCOLUMNS (
                    VALUES ( 'SALES VALUES'[LinkToCustomerID] ),
                    "DateOfFirstBuy", CALCULATE ( MIN ( 'SALES VALUES'[Related Date] ) )
                ),
                ALL ( 'SALES VALUES' )
            ),
            CONTAINS (
                VALUES ( 'SALES VALUES'[Related Date] ), 
                'SALES VALUES'[Related Date], 
    
                [DateOfFirstBuy] 
            )
        ))

[v-chuncz-msft]

@Sjon_1791 ,

You may try ALLSELECTED instead of ALL.

[Sjon_1791]

It is giving a error