The mail order firm of L. L. Pea receives an average of 200 calls per hour, where times between...

The mail order firm of L. L. Pea receives
an average of 200 calls per hour, where times between calls are exponentially
distributed. It takes an L. L. Pea operator an average of three minutes to
handle a call. If a caller gets a busy signal, L. L. Pea assumes that he or she
will call a competing mail-order company, and L. L. Pea will lose an average of
$30 in profit. The cost of keeping a phone line open is $9 per hour. How many
operators should L. L. Pea have on duty? Use simulation to answer this
question. Does the answer depend on whether the service times are exponentially
distributed?