When maintaining appropriate inventory$$ level, a purchasing manager should$\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

maintain adequate amount of inventory on hand at desired times and at a favorable price

B$.$

ensure that all orders could be filled$$ quickly, eliminating the need for back orders due to stockouts

C$.$

keep the inventory level$$ low, to ensure that the$$ firm's money is not being unwisely invested in excess resources

D$.$

implement the production plan to acquire the desired amount of finished goods available on time at a low cost