Hello, I am using below formula in order to get the data from PIVOT but the thing is it is getting more bigger and bigger as I have to add the numbers of all the months. Can someone please suggest a smart way of doing so?

=IFERROR(SUM(GETPIVOTDATA(T(P$6),Pivot_EBTDA!$B$5,"Substream Leader (approves IL3 to IL4)",$B$42,"Business/Operational Unit",C5,"Initiative Execution Owner (Accountable)",D5,"Metric > Metric",$N$7,"Metric > Metric",$N$8,"Metric > Metric",$N$9,"Metric > Metric",$N$10,"Metric > Metric",$N$11,"Metric > Metric",$N$12,"Metric > Metric",$N$13,"Metric > Metric",$N$14,"Purpose",$K$7)+GETPIVOTDATA(T(P$7),Pivot_EBTDA!$B$5,"Substream Leader (approves IL3 to IL4)",$B$42,"Business/Operational Unit",C5,"Initiative Execution Owner (Accountable)",D5,"Metric > Metric",$N$7,"Metric > Metric",$N$8,"Metric > Metric",$N$9,"Metric > Metric",$N$10,"Metric > Metric",$N$11,"Metric > Metric",$N$12,"Metric > Metric",$N$13,"Metric > Metric",$N$14,"Purpose",$K$7)+GETPIVOTDATA(T(P$8),Pivot_EBTDA!$B$5,"Substream Leader (approves IL3 to IL4)",$B$42,"Business/Operational Unit",C5,"Initiative Execution Owner (Accountable)",D5,"Metric > Metric",$N$7,"Metric > Metric",$N$8,"Metric > Metric",$N$9,"Metric > Metric",$N$10,"Metric > Metric",$N$11,"Metric > Metric",$N$12,"Metric > Metric",$N$13,"Metric > Metric",$N$14,"Purpose",$K$7)),0)