加總後以區排序 每三格為一區 (13556)

A13:O14=INDEX(1:1,RIGHT(LARGE(SUBTOTAL(9,OFFSET($A$2,,{0,3,6,9,12},,3))/1%+{0,3,6,9,12},INT(COLUMN(C1)/3)),2)+MOD(COLUMN(C1),3)+1)