Guide

1. Inside your Microsoft Excel worksheet, locate and select the cell that contains the formula you wish to edit.

2. After that, head over to the ribbon section and click the formula bar.

3. Place the text selection cursor right after the Equals (=) sign and then start typing the text you wish to add. Enclose it in a pair of quotation marks.

4. Subsequently, enter an 'Ampersand' symbol between the closing quotation mark and the Sum function. Once done, press the 'Enter' or the 'Return' key to run the formula.

5. After completing these steps, the text will be added to the selected formula in your Microsoft Excel worksheet.