Duplicating a column
In order to have a copy of the original data without having to create a new column and manually copy the data, you can simply duplicate a column.
Before working on the data, you will create a new column to receive the consolidated numbers.
Procedure
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Click Duplicate Column.
A copy of the column, mobile_copy, is created with the same data as the original.
Results
The mobile column is duplicated and can now receive the consolidated data.