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Requirement 4. Explain how Patient Care Instruments reduced the manufacturing cost per unit of HJ6 in 2022. Identify each of the actions taken by Patient Care Instruments to reduce the manufacturing cost per unit of HJ6 in 2022 . (Select all that apply.) A. Increased the cost per unit in each of the four cost categories B. Decreased the cost per unit in direct materials costs, manufacturing operations costs, and engineering change costs C. Increased machine-hours per unit (cost driver) D. Increased the number of engineering changes made (cost driver) E. Decreased the number of engineering changes made (cost driver) F. Decreased machine-hours per unit (cost driver)