I need to replace, blanks columns with zeros

[stojanchemanev]

Im having a pivot table created, lets say im displaying data as per day and for some days i don;t have a result so the i have blank column, but this miss calculate my average calculations. Therefore i would like to replace the blank cell with zero, for now im managing to do so with modifying the data, but in some cases i have a lot of records in rows where pivotjs is handling the overall's.

Is there any build options to handle this ?