You want to compare the sales revenue performance of the top 20% of your customers to the average of all of your customers. You decide to apply a rank on the table that shows customers and revenue…

You want to compare the sales revenue performance of the top 20% of your customers to the average of all of your customers. You decide to apply a rank on the table that shows customers and revenue and create a variable to show the average revenue for all customers. Which function should you use in the variable?