7. Luft Company uses the weighted-average method in its process costing system. Operating data for the first processing department for the month of June appear below: According to the company's records, the conversion cost in beginning work in process inventory was $79,893 at the beginning of June. Additional conversion costs of $343,830 were incurred in the department during the month. What was the cost per equivalent unit for conversion costs for the month? (Round off to three decimal places.) A. $8.070 B. $7.891 C. $5.928 D. $4.584