In most divisions there are about 50-75 officers available for the 3 shifts.  Avg. the numbers, say 60, (which is still to high) you have 480 to 500 officers actually on the street.  However, you must take into account the flex units and traffic units (Take away another 10 officers each division).  You are left with 400- 420 officers, if all are on full duty or not on paid administrative leave.  This number is probably still a little high, with most of the officers being placed in the worst