Add calculated column in pivot table based on other columns in the same pivot table

问题

I have a pivot table that calculates the count of pallets of each type of product and the sum of the age

I want to add a calculated field/column with the average age of each product R/Q in this case.
But when I try and add calculated field I only get options from the original table, meaning I can't get the count and sum of the apples.

Can this be done?

EDIT: I want this to be part of the pivot table since I want to be able to sort on this calculated value.
If I add this value "outside" I can't sort the "mix" of pivot and normal column.

来源：https://stackoverflow.com/questions/64332533/add-calculated-column-in-pivot-table-based-on-other-columns-in-the-same-pivot-ta