An experiment is to be performed to determine the effectiveness of a new product promotion program.

The experiment will be used to compare four different promotion techniques. Each customer will be

exposed to only one of the four promotions. Customers from five different geographical regions will be

considered. Customers will also be divided up into three categories by size as determined from annual

sales. Customers can be exposed to their program for either three or six months. How many different

configurations are there in this experiment?