Ridgewood, Inc. manufactures upholstery fabric and uses process costing. In the Weaving Department, direct materials are added at the beginning of the process, and conversion costs are added evenly throughout the process. During the month, the Weaving Department used $280,000 of direct materials and $70,000 of conversion costs. At the end of the month, 10,000 equivalent units of direct materials and 9,000 equivalent units of conversion costs had been used. What is the cost per equivalent unit for conversion costs? (Round answer to the nearest cent.) A. $28.00 per EU B. $31.11 per EU $7.00 per EU D. $7.78 per EU