Using an IN filter for pie chart segmentation

This query shows how the IN filter can be used to populate a pie chart showing sales divided into six segments: one segment for each of the five largest customers, and one segment showing the aggregate sales for all other customers.

The first statement gathers the sales for the top five customers, and the second statement aggregates the sales for all customers not in the top five:

RETURN Top5 AS SELECT 
SUM(Sale) AS Sales
FROM SaleState
GROUP BY Customer 
ORDER BY Sales DESC 
PAGE(0,5);

RETURN Others AS SELECT 
SUM(Sale) AS Sales
FROM SaleState 
WHERE NOT [Customer] IN Top5 
GROUP