let
    Source = #"DV Before Upload",
    #"Grouped Rows" = Table.Group(Source, {"COO Date", "Location"}, {{"Volume", each List.Sum([Volume]), type nullable number}}),
    #"Sorted Rows" = Table.Sort(#"Grouped Rows",{{"COO Date", Order.Descending}}),
    #"Changed Type" = Table.TransformColumnTypes(#"Sorted Rows",{{"Volume", Int64.Type}})
in
    #"Changed Type"