Cumulative Sum with Conditional Reset for Negative Values and Store Change in Power BI

Hi, ananyarshetty 

Thanks for bhanu_gautam reply. You can use M language to achieve your need. It is so difficult to realize this requirement using DAX

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("bY9LEsQgCETv4jpW8Y+eJeX9rzG2ziIh2WDDoxGuq/BZjiIkxjSF6g7juBOeggUpByUmSzhs4YlhGHeb0b0nhmq1QN4lMUyrrHjydwEkRB8IonoA+WvNtuDa1tpm7X54j/aPT4bTzWBjND4hylU7oJ6coO4jllVm0xg/", BinaryEncoding.Base64), Compression.Deflate)), 
    let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Store = _t, WeekID = _t, #"Boxes-Goal" = _t, #"Remaining Boxes" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Store", Int64.Type}, {"WeekID", Int64.Type}, {"Boxes-Goal", Int64.Type}, {"Remaining Boxes", Int64.Type}}),
    FX = (values as list) as list =>
        let
            GRTList = List.Generate(
                () => [GRT = values{0}, i = 0],
                each [i] < List.Count(values),
                each 
                    let
                        nextGRT = if [GRT] > 0 then [GRT] + values{[i] + 1} else values{[i] + 1}
                    in
                        [GRT = nextGRT, i = [i] + 1],
                each [GRT]
            )
        in
            GRTList,
 
    // Group by Store and apply transformations
    Grouped = Table.Group(
        #"Changed Type",
        {"Store"},
        {
            {"Transformed", each 
                let
                    weekidlist = List.Buffer([WeekID]),
                    boxesgoallist = List.Buffer([#"Boxes-Goal"]),
                    result = Table.FromColumns(
                        {weekidlist, boxesgoallist, List.Transform(FX(boxesgoallist), each if _ < 0 then 0 else _)},
                        {"WeekID", "Boxes-Goal", "Output"}
                    )
                in
                    result
            }
        }
    ),
    #"Expanded Transformed" = Table.ExpandTableColumn(Grouped, "Transformed", {"WeekID", "Boxes-Goal", "Output"}, {"WeekID", "Boxes-Goal", "Output"})
in
    #"Expanded Transformed"

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

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