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

, you can group worksheets by holding down the Ctrl key and clicking on each worksheet tab that you want to group. Once the worksheets are grouped, any changes made on one worksheet will apply to all the worksheets in the group.

To group the January, February, and March worksheets, you can follow these steps:

1. Click on the January worksheet tab.
2. Hold down the Ctrl key and click on the February worksheet tab.
3. While still holding down the Ctrl key, click on the March worksheet tab.

Now, the January, February, and March worksheets should be grouped. You can verify this by looking at the title bar, which should show [Group] before the filename.

Next, you can go to cell C12 on the January worksheet and use the AutoSum button to total the values in range C4:C11. To do this:

1. Click on cell C12 on the January worksheet.
2. Click on the AutoSum button in the Editing group on the Home tab. This button looks like the Greek letter sigma (∑).
3. Excel will automatically select the range C4:C11 and insert the SUM formula in cell C12.

After you have totaled the values in range C4:C11 on the January worksheet, you can ungroup the worksheets by clicking on any worksheet tab that is not in the group.

Finally, switch to the February worksheet by clicking on its tab to view and work on that worksheet separately.