23 Daily demand D for a given product follows a probability mass function [p ) where py = P(D = d), d= 0, 1, 2, 3, 4, and (Pos .. .. p.) = 10.7, 0.15, 0.1, 0.04, 0.01}. The inventory on hand is reviewed in the morning every four days. Thus we consider the four-day interval between successive reviews a period. If the inventory at the start of a period is less than s, it is ordered to S (s