Option: PSGW AOU RETURNS & AMIS COUNT

For AMIS purposes, the system must know how to credit returns.
This option allows the user to identify the "usual" method of
drug distribution to be credited for each AOU.  ALL returns
from the AOU will be credited to this method.
For AMIS purposes, the system must know if the inventories for
each AOU are to be counted in the AR/WS Stats File.
MOST AOUs will count on AMIS, however, an AOU used for internal
inventory purposes within the pharmacy should not.