How can knowing the cost per output and cost per outcome benefit a human services agency?

Can some one please help me with these questions I can not find the correct info. 3. Traumatic events do not always result in a diagnosable psychological disorder. What factors determine how a person may be affected by one such event? 4. What are the four stages in meeting the psychological needs of disaster victims? 7. List and briefly describe four psychological treatments for physical disorders.