Power Pivot running total without date column - NOT in Power BI

Hi all,

I am using Power Pivot in Excel and want to calculate the running total without Date column.
I found the following tutorial, which is for DAX in Power BI and tried to convert this to Excel Power Pivot but I am not able to do so.
Please can you help me converting this so that I can use it in Excel.

https://www.antmanbi.com/post/how-to-create-running-total-on-non-numeric-fields.

I am attaching a sample data table.

Running Total Brands = 
VAR CurrentBrandSales = 
    [Total Sales]
VAR BrandsWithSales = 
    ADDCOLUMNS ( 
        ALLSELECTED ( Products[Brand] ),
        "@Sales", [Total Sales]
    )
VAR BrandsWithHigherSales = 
    FILTER ( BrandsWithSales, [@Sales] >= CurrentBrandSales )
VAR Ranking = 
    -- Used only for confirming the ranking
    COUNTROWS ( BrandsWithHigherSales )
VAR Result = 
    SUMX ( BrandsWithHigherSales, [@Sales] )
RETURN
    Result

Thanks,

Naveen