4. Given the following data, calculate a level production plan, quarterly ending inventory, and average quarterly inventory. If inventory carrying costs are $4 per unit per quarter, what is the annual carrying cost? Opening and ending inventories are zero (0). Totals Quarter 1 5000 Quarter 2 6000 Quarter 3 9500 Quarter 4 7500 Forecast Demand Production Ending Inventory Average Inventory Inventory Cost 5. If the annual cost of goods sold is $40,000,000 and the average inventory is $8,000,000: a. What is the inventory turns ratio? b. What would be the reduction in average inventory if, through better materials management, if the inventory turns ratio was increased to 10 times per year? c. If the cost of carrying inventory is 10% of average inventory, what is the annual savings? 6. A company has 528 units on hand and the annual usage is 12,000 units. There are 250 working days per year. What is the days of supply? "PP