To add columns to the end of a spreadsheet when the last column is IV, you can follow these steps:
[list=1][*]Click on the column header of column IV to select the entire column.[*]Right-click on the column header and select "Insert" from the drop-down menu.[*]A new column (column V) will be inserted to the right of column IV.[*]Repeat steps 1-3 until you have inserted enough columns for the remaining months of the year.[*]If you receive the message "Excel cannot shift nonblank cells off the worksheet," it means that there are non-blank cells in the columns to the right of the columns you are trying to insert. To fix this, you can try the following:

• Select all the columns to the right of the columns you want to insert.
• Right-click on the selected columns and choose "Delete" from the drop-down menu.
• In the "Delete" dialog box, select "Entire column" and click "OK."
• Now try inserting the new columns again.

By following these steps, you should be able to add columns to the end of your spreadsheet and track your staff's daily time activity for the remaining months of the year.