let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Split Column by Delimiter" = Table.SplitColumn(Source, "Column1", Splitter.SplitTextByDelimiter(" ", QuoteStyle.Csv), {"Column1.1", "Column1.2", "Column1.3", "Column1.4", "Column1.5"}),
#"Removed Other Columns" = Table.SelectColumns(#"Split Column by Delimiter",{"Column1.1", "Column1.4"}),
#"Changed Type" = Table.TransformColumnTypes(#"Removed Other Columns",{{"Column1.1", Int64.Type}, {"Column1.4", Int64.Type}}),
#"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each [Column1.4]/12),
#"Inserted Addition" = Table.AddColumn(#"Added Custom", "Addition", each [Column1.1] + [Custom], type number),
#"Removed Other Columns1" = Table.SelectColumns(#"Inserted Addition",{"Addition"})
in
#"Removed Other Columns1"