Problem 13.5 Question Help The president of Hill Enterprises, Terri Hill, projects the firm's aggregate demand requirements over the next 8 months as follows: 2300 January February March April 1500 1,700 1.700 1.700 2100 May June July August 1.900 1,500 Her operations manager is considering a new plan, which begins in January with 200 units of inventory on hand. Stockout cost of lost sales is $100 per unit. Inventory holding cost is $20 per unit per month. Ignore any idle-time costs. The plan is called plan C Plan C: Keep a stable workforce by maintaining a constant production rate equal to the average gross requirements excluding initial inventory and allow varying inventory levels. Conduct your analysis for January through August The average monthly demand requirement units. (Enter your response as a whole number.)