As a risk assessment procedure, lets see what customers have large total sales volume. Create a new worksheet (or tab). Drag and drop Customer No. to the Columns line. Drag and drop Invoice Total to the Rows line. Tableau defaults to a bar chart. However, click on Show Me and change the presentation to Packed Bubbles. Save worksheet as Total Sales by Customer. Which customer number has the largest total sales volume? To make things even clearer, drag and drop Invoice Total to the Color section of the Marks frame. Undo this color filter before continuing.