A Lawn and Garden Shop That Is Open for Business

Short Answer

A lawn and garden shop that is open for business seven days a week orders bags of grass seed every OTHER Monday. Lead time for seed orders is 5 days. On Monday, at ordering time, a clerk found 112 bags of seed in stock, and so he ordered 198 bags. Daily demand for grass seed is normally distributed with a mean of 15 bags and a standard deviation of four bags.
The manager would like to know what the probability is that a grass seed stockout will occur before the next order arrives.