Is it possible to create a custom function "sum the value by field", which will be used in the pivot table XL 2007. Standard sums, column, average, max, etc. are not enough for me. I would make a decision in VBA or a solution that requires XLA or XLL.
Please note that I am NOT asking about a design field or design element. None of my goals - I need to summarize basic data with features such as median, 1st quartile, etc.
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