Hi Brian,

Yes, it is possible to show the average instead of the sum in the Grand Total of a Pivot Table. Here's how you can do it:

1. Select the data range that you want to pivot and go to the 'Insert' tab in the Excel ribbon.
2. Click on 'PivotTable' and choose where you want to place the Pivot Table.
3. In the 'PivotTable Fields' pane, drag the 'Area' field to the 'Rows' area and the 'Period' field to the 'Columns' area.
4. Drag the 'Cost' field to the 'Values' area. By default, it will show the sum of the costs.
5. To change the calculation to average, click on the drop-down arrow next to the 'Cost' field in the 'Values' area and select 'Value Field Settings'.
6. In the 'Value Field Settings' dialog box, select 'Average' instead of 'Sum' under the 'Summarize value field by' section.
7. Click 'OK' to close the dialog box.
8. Now, to show the average in the Grand Total, click on the drop-down arrow next to the 'Cost' field in the 'Values' area again and select 'Field Settings'.
9. In the 'Field Settings' dialog box, select 'Average' instead of 'No Calculation' under the 'Custom' section.
10. Click 'OK' to close the dialog box.

That's it! Your Pivot Table should now show the average of the costs for each period and the average of all periods in the Grand Total.