Operations management. This is my last question now, please help me with these

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The Carbondale Hospital is considering the purchase of a new ambulance. The decision will rest partly on the anticipated mileage to be driven next year. The miles driven during the past 5 years are as follows: Year 1 3,100 2 3,950 3 3,450 4 3,850 5 3,750 Mileage a) Using a 2-year moving average, the forecast for year 6 = 3800 miles (round your response to the nearest whole number). b) If a 2-year moving average is used to make the forecast, the MAD based on this = miles (round your response to one decimal place). (Hint: You will have only 3 years of matched data.) William Beville's computer training school, in Richmond, stocks Workbooks with the following characteristics: Demand D Ordering cost S Holding cost H 19,500 units/year $25/order $4/unit/year a) The EOQ for the workbooks is 494 (round your response to the nearest whole number). b) What are the annual holding costs for the workbooks? $ 987 (round your response to the nearest whole number). c) What are the annual ordering costs round your response to the nearest whole number). If D = 7,800 per month, S = $46 per order, and H = $2.00 per unit per month, a) What is the economic order quantity? The EOQ is 599 units (round your response to the nearest whole number). b) How does your answer change if the holding cost doubles? The EOQ is 424 units (round your response to the nearest whole number). c) What if the holding cost drops in half? The EOQ is units (round your response to the nearest whole number)