A university bookstore sells a popular supply chain textbook. The bookstore sells the book for $300 and purchases it from the publisher for $ 128 . At this price, the anticipated demand is normally distributed with a mean of 140 units and standard deviation of 33 units. Any unsold textbooks after the first 4 weeks of the semester will be sold back to the publisher for $64 . It costs $ 5 to hold a unit in inventory for those 4 weeks. Round all entries to two decimal places.
Compute the optimal number of units the bookstore should order:
units.