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The Skate Board Company uses a process cost system for making skateboard wheels. Materials are added at the beginning of the process and conversion costs are uniformly incurred throughout the process. At the beginning of September, the work-in-process is 40% complete and at the end of the month, it is 60% complete. Spoilage is detected at the end of the process. Other data for the month include: Beginning WIP inventory Units started Units placed in finished goods (good units completed) Ending WIP inventory Normal spoilage of good units finished 1,600 units 20,000 units 12,000 units 1,200 units 20 % Determine: 1. Physical unit flow, including all spoilage 2. Wt Ave Equivalent units, including all spoilage for as many categories as necessary