Aggregate Function Using Sum

Originally Posted by gtbaseball7

Also, what is the default [k] value for this function? I've tried default and using 1. Not quite clear on what [k] means...

There isn't a k value when you use 9 (sum). That only applies when it fits the function in question, I.e with functions 14 to 19, SMALL, LARGE, PERCENTILE and QUARTILE