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Add a new column with a running (cumulative) total of the selected column.
Total the 'transaction' column:
Total the 'transaction' column separately for each 'area' value:
•Set Column to the column you want to total.
•Set By to a column if you want a separate running total per value in that column. Leave as <None selected> if you only want a single running total.
•Non-numerical values are ignored.
•The By column takes account of case and whitespace in values.