Running total with group

Hi Julian_12 ,

According to your description, you need to use the pivot column function in the power query, and then replace the null values in it. Refer to the following screenshot.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("ZY+xDoAgDET/hZkmbRXRUf0MwqCROOnA/w+CEURJmiaXl7trjRGjkIIwLEYmQALugti9c6ew8uEqcwXIFWdOnMLEsOVYnb/5FNE/3rstwzZ7EXCovFhEc/OpnoNS1emvPXLi4vRbpO5IdYYaqK/Nqiwv/rYX", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Product = _t, PurchaseItem = _t, PurchaseDate = _t, #"Value Band for product" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Product", type text}, {"PurchaseItem", Int64.Type}, {"PurchaseDate", type date}, {"Value Band for product", type text}}),
    #"Removed Columns" = Table.RemoveColumns(#"Changed Type",{"Product"}),
    #"Pivoted Column" = Table.Pivot(#"Removed Columns", List.Distinct(#"Removed Columns"[#"Value Band for product"]), "Value Band for product", "PurchaseItem"),
    #"Sorted Rows1" = Table.Sort(#"Pivoted Column",{{"PurchaseDate", Order.Ascending}}),
    #"Replaced Value" = Table.ReplaceValue(#"Sorted Rows1",null,0,Replacer.ReplaceValue,{"green", "amber", "red"})
in
    #"Replaced Value"

If the problem is still not resolved, please provide detailed error information and let me know immediately. Looking forward to your reply.

Best Regards,
Henry

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