Graphical user interface Description automatically generated

{ FIXED [Category] : SUM([Profit])} - It calculates the profit of each category. In our view, all the profits values are the same, so it is not the right answer.
{ FIXED [Region] : SUM([Profit])} - It calculates the profit of each region.
{SUM([Profit])} is equivalent to {FIXED : SUM([Profit])}. It is the table level scope, which means this is the profit of the entire dataset.

Tableau automatically associates discrete fields with categorical palettes Refer: https://help.tableau.com/current/pro/desktop/en-us/visual_best_practices.htm

Union - The data to combine has the same structure but consists of data of different years.
Blend - The data to combine is at a different level of detail.

Create a Calculation to get the first alphabet of the customer name.
Graphical user interface, text, application Description automatically generated

Now drop the First Alphabet field to Rows and Quantity field to the Text on the Marks card. Change the aggregation from SUM to AVG. Your view will look like this: