You and a couple of friends from the MBA program decide to sell T-shirts during the Fall Online MBA residency to commemorate the event. The T-shirts sell for 25 but only cost 8 to produce. After the residency weekend you think you can sell them only at 5 per T-shirt. Suppose the demand for shirts can be approximated with a normal distribution and the mean demand is 100 shirts with a standard deviation of 25? What is the target service level? How many shirts should you produce?