pivot table embedded formula

Good day,

I want to add an embedded formula to a pivot table,

for the below example I want the field "Score" with value 4 + field "Score" value 5 / total Score

(Score[4] + score[5]) / Score

ActiveSheet.PivotTables("PivotTable1").PivotFields("Overall Satisfaction").PivotItems("4")
+
ActiveSheet.PivotTables("PivotTable1").PivotFields("Overall Satisfaction").PivotItems("5")
/
ActiveSheet.PivotTables("PivotTable1").PivotFields("Overall Satisfaction")


int he example below ...

Agent X% = 40 + 70 / 172 = 64%

Score
Agent 1 2 3 4 5
X 36 11 15 40 70
Y 10 9 10 12 69
Z 58 10 9 19 44

I can use the field =GETPIVOTDATA("Score",$B$4,"Agent","X","Month",1,"Week num",1,"Score",4)

or simply just use (F8+G8)/H8, however wanted to see if this could be done with an embedded formula,

thanks for your time,