To calculate subtotal for a table, the first step is to use the button on the table tools design tab.

To calculate subtotal for a table, the first step is to use the convert to range button on the table tools design tab.
 The button is used to stop working with your data in a table without losing any table style formatting that you have applied. It enables converting the data so it will become a part of the worksheet.

The correct answer that should be put there is 'boundaries'

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