Thanks everyone for all the help!~
I have tried both
xlbo
=SUM(IF(FREQUENCY(MATCH(IF(LEN(Bid_Mgr)=0," ",Bid_Mgr),IF(LEN(Bid_Mgr)=0," ",Bid_Mgr),0),MATCH(IF(LEN(Bid_Mgr)=0," ",Bid_Mgr),IF(LEN(Bid_Mgr)=0," ",Bid_Mgr),0))>0,1))-1
N1GHTEYES
SUM(IF(FREQUENCY(MATCH(IF(LEN(Bid_Mgr)=0,"...