7. Wyatt Inc. uses the weighted average method in its process costing system. The following data concern the operations of the company's first processing department for a recent month. ........ Work in process, beginning: Units in process 100 Stage of completion with respect to materials..............70% Stage of completion with respect to conversion..... .90% Costs in the beginning inventory: Materials cost ...... .$182 Conversion cost ...... ..$3,429 Units started into production during the month ............... 10,000 Units completed and transferred out ..... .9,700 Costs added to production during the month: Materials cost ................ $27,986 Conversion cost ....... .........$373,815 Work in process, ending: Proje 400 Units in process Stage of completion with respect to materials............90% Stage of completion with respect to conversion...........70% Required: Using the weighted-average method: a. Determine the equivalent units of production for materials and conversion costs. b. Determine the cost per equivalent unit for materials and conversion costs. c. Determine the cost of units transferred out of the department during the month. d. Determine the cost of ending work in process inventory in the department