Hi Harlan,
I'm back and I see you read the OP request correctly.
I always thought he wanted one result (scalar) and I was wrong.
Just as an alternative, he can put (In C12, and copy to Cx):
=SUM(INT((B12-WEEKDAY(B12-{1,2,3,4,5})-A12+8)/7))-1
Anyway, thanks for following up.
Daniel M.