We have a detention center intake facility which operates 24/7.  Monday thru Friday there are 16 employees per 8 hour shift.  On weekends there are 14 employees per 8 hour shift.  (We also have max capacity for 24 detainees which we are counting as transients.)

FTE (M-F) = 16 employees x 8 hrs x 3 shifts = 48

FTE (S-S) = 14 employees x 8 hrs x 3 shifts = 42

FTE = ((48 x 5 days) + (42 x 2 days)) / 7 days = 46.29 (daily average)

Is this the proper way to calculate the FTE?  Which number should be used as FTE for the Water Use calculations?