Assignment:
Question 1. The purchasing manager for the Atlantic Steel Company must determine a policy for ordering coal to operate 12 converters. Each converter requires exactly 5 tons of coal per day to operate and the firm operates 360 days per year. The purchasing manager has determined that the ordering cost is $80 per order and the cost of holding coal is $2.40 per ton per year. The purchasing manager has negotiated a contract to purchase the coal for $12 per ton for the coming year.
a. Determine the optimal quantity of coal to purchase for each order.
b. Determine the total inventory? related costs associated with the optimal ordering policy (do not include the cost of the coal).
c. If 5 days of lead time are required to receive an order of coal, how much coal should be on hand when an order is placed?