b) The average number of callers waiting to place an order = ____ callers (round vour response to two decimal places).

C) The present total cost per hour (service cost + waiting cost) = $____ per hour (round your response to two decimal

places).

D) Janson's is considering adding a second clerk to take calls. The store's cost would be the same $10 per hour. The total cost (service cost + waiting cost) = $_____ per hour (round your response to two decimal places).

E) By hiring the second clerk, the total cost savings per hour for Janson's = $_____ per hour (round your response to two

decimal places).

Janscn's Department Store in Stark, Ohio, mairtains a successful catalog sales department in which a clerk takes orders by telephone. If the clerk is occupbed on one line, incoming phone cals to the catalog department are answered automatically by a recording machine and asked to wait. As scon as the cierk is tree, the party who has wated the longest is translerred and serviced first. Calls come in at a rate of about 11 per hour. The dierk can take an order in an average of 3.0 minutes. Calls tend to follow a Poisson distribution, and service times tend to be negative exponential. The cost of the clerk is $10 per hour, but because of lost goodwil and sales, Janson's loses about $27 per hour of cuslomer time spent waiting for the clerk to take an order. a) The average time that catalog customers must wait before their calls are transfered to the order clork = minutes (round your response to two decimal ploces)