Haffner Corporation uses the weighted-average method in its process costing system. Data concerning the first processing department for the most recent month are listed below: The cost of ending work in process imventory in the first processing dopartment according to the company's cost system is closest to: (Round "Cost per equivalent unit" to 3 decimal places.) Haffner Corporation uses the weighted-average method in its process costing system. Data concerning the first processing department for the most recent month are listed below: The cost of ending work in process imventory in the first processing dopartment according to the company's cost system is closest to: (Round "Cost per equivalent unit" to 3 decimal places.)