Portal Manufacturing, which began business in 2020, uses a weighted-average process-costing system. The following figures pertain to July: Units completed Ending work in process Physical Units 120,000 40,000 Equivalent Units Materials Conversion 120,000 120,000 40,000 18,000 All materials are introduced at the start of the process, and conversion costs are incurred evenly throughout production. The company used direct materials that cost $640,000; conversion amounted to $8 per equivalent unit. REQUIRED: A. Calculate the direct materials cost per equivalent unit. B. Calculate the cost of units completed and transferred. What percentage of conversion work will be performed on the 40,000-unit ending work-in- process inventory during August? D. In all likelihood, were all of the 120,000 completed units begun in July? Explain