Need to total QTD numbers from an array. Using this formula =SUM(OFFSET(INDEX('HC Data'!$C$3:$P$17, MATCH($B40,'HC Data'!$B$4:$B$17,0),MATCH($A$3,'HC Data'!$C$3:$P$3,0),1),1,1-MOD(MONTH($A$3),3),1,MOD(MONTH($A$3),3))) works for 2 (i.e Oct & Nov of Q4 months but get an N/A on the 3rd month (i.e Dec of Q4)
Solved by V. J. in 23 mins