Instead of total sales volume, examine average sales volume. 0 Right-click on the Total Sales by Customer tab, and duplicate. Rename this tab Average Sales by Customer. 0 Click on the dropdown arrow neXt to SUM(Invoice Total) in the Marks frame, then click on Measure, then Average. 0 In this case, the Bubbles Chart no longer provides a clear answer about which customer has the highest average sale amount. Instead, click on Show Me and change the presentation to Circle Views. Which customer number has the highest average invoice amount