QUESTION 6 A. Calculate (EOQ) using following information for APEX Inc. i. Annual demand 90,000 units ii. Cost of placing order $ 30 iii. Cost of carrying 1 unit in inventory $9 B. Calculate average inventory when safety stock is 2,000 units. C. "In the process of maintaining inventory records and physical count of goods on hand,error may occur."Explain. (20 marks)