Historically, prices were:. a. analyzed and changed constantly.
b. the center of attention in almost all marketing strategies.
c. calculated to minimize contribution per unit.
d. rarely changed except in response to radical shifts in market conditions.
e. allowed to vary seasonally as cross-shopping tendencies fluctuated.

Customers arrive at rich dunn's styling shop at a rate of 3 per hour, distributed in a poisson fashion. rich can perform an average of 5 haircuts per hour, according to a negative exponential distribution.a) the average number of customers waiting for haircuts= customersb) the average number of customers in the shop= customersc) the average time a customer waits until it is his or her turn= minutesd) the average time a customer spends in the shop= minutese) the percentage of time that rich is busy= percent