=IF(COUNT($CF$1:$CM$1)=8,COUNTIF(A1:CB1,$CF$1)*COUNTIF(A1:CB1,$CG$1)*COUNTIF(A1:CB1,$CH$1)*COUNTIF(A1:CB1,$CI$1)*COUNTIF(A1:CB1,$CJ$1)*COUNTIF(A1:CB1,$CK$1)*COUNTIF(A1:CB1,$CL$1)*COUNTIF(A1:CB1,$CM$1),IF(COUNT($CF$1:$CM$1)=7,COUNTIF(A1:CB1,$CF$1)*COUNTIF(A1:CB1,$CG$1)*COUNTIF(A1:CB1,$CH$1)*COUNTIF(A1:CB1,$CI$1)*COUNTIF(A1:CB1,$CJ$1)*COUNTIF(A1:CB1,$CK$1)*COUNTIF(A1:CB1,$CL$1),IF(COUNT($CF$1:$CM$1)=6,COUNTIF(A1:CB1,$CF$1)*COUNTIF(A1:CB1,$CG$1)*COUNTIF(A1:CB1,$CH$1)*COUNTIF(A1:CB1,$CI$1)*COUNTIF(A1:CB1,$CJ$1)*COUNTIF(A1:CB1,$CK$1),IF(COUNT($CF$1:$CM$1)=5,COUNTIF(A1:CB1,$CF$1)*COUNTIF(A1:CB1,$CG$1)*COUNTIF(A1:CB1,$CH$1)*COUNTIF(A1:CB1,$CI$1)*COUNTIF(A1:CB1,$CJ$1),IF(COUNT($CF$1:$CM$1)=4,COUNTIF(A1:CB1,$CF$1)*COUNTIF(A1:CB1,$CG$1)*COUNTIF(A1:CB1,$CH$1)*COUNTIF(A1:CB1,$CI$1),IF(COUNT($CF$1:$CM$1)=3,COUNTIF(A1:CB1,$CF$1)*COUNTIF(A1:CB1,$CG$1)*COUNTIF(A1:CB1,$CH$1),IF(COUNT($CF$1:$CM$1)=2,COUNTIF(A1:CB1,$CF$1)*COUNTIF(A1:CB1,$CG$1),IF(COUNT($CF$1:$CM$1)=1,COUNTIF(A1:CB1,$CF$1)))))))))
That's quite a formula.