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Inventory manager for I really can't known It's Not Meat brand is faced with developing safety stock policy to guarantee 90% of the customer orders will be shipped from inventory, she has access to historical demand and supply data. She computed the following: Average Daily Demand = 50 Units Standard Deviation of Daily Demand = 20 Units Average Delivery Lead Time = 7 Days Standard Deviation of Delivery Lead Time = 2 Days She would like to compute safety stock using only demand variability and both demand and lead time variability so as to understand the impact of lead time variability and take the right decision on safety stock levels. She requested your help in computing safety stocks using the data provided. Please develop safety stocks by considering just demand variability and both demand and lead time variability. Provide impact of lead time variability on inventory investment if each unit of the product costs $10