column with IF order, total incorrect

Hi Syndicate_Admin ,

Due to I don't know your table and data model, here I will give you some suggestions.

1. Is [prov po + model] a condtional column like [Reference Comm]? 

If "Yes", I suggest you to use summarize() in SUMX() table field.

2. Does [prov po + model] come from the same table as [Reference Comm]?

If "Yes", meausure should look like as below.

New Units prov Recibidas 2 =
SUMX (
    SUMMARIZE (
        'TableName',
        'TableName'[Reference Comm],
        'TableName'[prov po + model]
    ),
    [Units prov Recibidas 2]
)

If "No", add [prov po + model] based on your data model.

Best Regards,
Rico Zhou

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.