A product has a normally distributed usage with an average daily demand of 400 units and a daily standard deviation of 50 units. Currently, the lead time for the item is 5 days and the company maintains a 95% service level for the product. If the lead time can be reduced to 4 days, what happens to safety stock if the company wants to maintain a 95% service level

For a firm that uses the weighted average method of process costing, which of the following must be true? (a) physical units can be greater than or less than equivalent units. (b) physical units must be equal to equivalent units. (c) equivalent units must be greater than or equal to physical units. (d) physical units must be greater than or equal to equivalent units.