Sum values for each category

Hi,

I am not sure if I understood your question correctly, but I tried to create a sample pbix file like below.

Please check the below picture and the attached pbix file.

Order count: = 
SUMX (
    VALUES ( Fruit[Fruit] ),
    COUNTROWS (
        CALCULATETABLE (
            FILTER (
                SUMMARIZE ( Data, Data[Customer  ID], Data[Order Date], Data[quantity] ),
                Data[quantity] > 0
            )
        )
    )
)