How to Group the January, February, and March worksheets, then in cell C12 on the January worksheet, use the AutoSum button to total the values in range C4:C11. Ungroup the worksheets and switch to the February worksheet. In excel
To group the January, February, and March worksheets in Excel, you would need to first select the January worksheet, then hold down the Ctrl key and select the February and March worksheets.
After selecting all three worksheets, right-click on any of the selected worksheet tabs and choose "Group Sheets" from the context menu.
To use the AutoSum button to total the values in range C4:C11 in cell C12 on the January worksheet, simply select cell C12, click on the AutoSum button in the "Editing" group on the Home tab, and Excel will automatically sum up the values in the selected range.
Once you have calculated the total in cell C12, you can ungroup the worksheets by right-clicking on any of the worksheet tabs and selecting "Ungroup Sheets" from the context menu.
To switch to the February worksheet, simply click on the February worksheet tab at the bottom of the Excel window.