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Harker Corporation uses the weighted-average method in its process costing system. The first processing department, the welding Department, started the month with 21,000 units in its beginning work in process inventory that were 30% complete with respect to conversion costs. The conversion cost in this beginning work in process inventory was $44, 990. An additional 92,000 units were started into production during the month and 96,000 units were completed in the Weeding Department and transferred to the next processing department. There 17,000 units in the ending work in process inventory of the Welding Department that were 20% complete with respect to conversion costs. A total of $679, 800 in conversion costs were incurred in the department during the month. The cost per equivalent unit for conversion costs for the month is closest to: $7.292 $7.480 $7.389 $5.288