Calculate Average In Pivot Table

With Pivot Tables, there is the ability to add Grand Totals to Rows or Columns, but I want to add Averages to the end of the row instead. Can this be done? I have tried Calculated Fields but can't get the right result. Auto Merged Post;Hi again,

After I posted this I found another similar post, where the answer was that the "Average" calculation has to be done outside the pivot table, ie. there seems to be no way the pivot will give averages for rows, only grand totals.

If this is the case then I will have to work around it.... I was hoping it could be done within the pivot because I have graphs linking to the pivot and they all go spak when I update the pivot with different data. The number of columns will change all the time, meaning the average will need to be reworked. Just trying to save time!