Matrix Inc. calculates cost for an equivalent unit of production using the weighted-average method Data for July: Work-in-process inventory, July 1 (36,000 units): Direct materials (100% completed) conversion (50% completed ) Balance in work in process inventory, July 1 $122,400 76,800 $199,200 90,000 102,000 Units started during July Units completed and transferred Work-in-process inventory, July 31: Direct materials (100% completed) conversion (50% completed ) 24,000 Cost incurred during July: Direct materials Conversion costs $180,000 288,000 The cost of goods completed and transferred out under the weighted-average method is calculated to be: $96,000 $476,400 $468,200 $484,000 $571,200