Daily demand of Dulcolax tablets in a drug store follows a normal distribution with an average demand of 50 strips of tablets and standard deviation of demand equal to 20 strips. It takes 4 days to supply the order placed by the drug store. (i.e., lead time). The store wants to maintain 95% customer service level (for 95% service level, assume the value of z = 1.64) and monitors its inventory continuously. What is the approximate re-order point level? Group of answer choices 246 256 286 276 266