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During the summer season, the demand for basic white color baby shirts sold by the retailer Happy Baby is normally distributed with a mean of 1500 and a standard deviation of 200+ Last 2 digits of your student or wtsHappy Baby makes only one ordering for these white baby t-shirts to the manufacturer before the start of the summer season The manufacturer sells to the retailer at 20 TL/unit. Then the retailer sells to end customers for 40+Last 1-digit of your student ID TL/unit during the season. The unsold units at the retailer by the end of season are sold by the retailer with a big end-of-season sale for "S+Last 1-digit of your student 1DT/unit. Calculate the cost of shortage (Cu) and overage cost (co) for one t-shirt for the retailer Happy Baby? (4 pts) II. What is the optimal order quantity for the retailer at the beginning of the season? (4 pts) ill. According to the optimal order quantity what is the amount of safety stock? (2 pts)