hi prajakta
well if i relating to your question correctly
here
BHCC = 4.8
ASR = 0.8
BHCA = ?
Now the relation is
BHCC = BHCA * ASR
4.8/0.8 = BHCA
BHCA = 6
alwasy BHCA > BHCC as it involves unsuccesful attempts of calls
i hope i haveinterpreted ur question rite .
regards
Krish