Kira Zrust is irritated by staffing issues. She doesn't want to increase her labor costs, but she is starting to think

that she is losing customers because of too much waiting. So$,$ the question is$,$ should she add another person?

Right now customers arrive at a rate of $96$ per $8$ hour day. Each member of the staff can serve $15$ people per $8$ hour day.

A staff member costs $$180$ per $8$ hour day. She estimates cost of waiting before service per customer per $8$ hour day to be $$500$