Atwich Corporation uses the weighted-average method in its process costing system. This month, the beginning inventory in the first processing department consisted of 600 units. The costs and percentage completion of these units in beginning inventory were: Cost percent complete Material Cost $10,700 70% Conversion Cost $13,900 50% A total of 5,100 units were started and 4,400 units were transferred to the second processing department during the month. The following costs were incurred in the first processing department during the month: Material cost $103,700 Conversion cost $ 180,900 The ending inventory was 75% complete with respect to materials and 10% complete with respect to conversion costs. Note: Your answers may differ from those offered below due to rounding error. In all cases, select the answer that is the closest to the answer you computed. To reduce rounding error, carry out all computations to at least three decimal places. The cost of ending work in process inventory in the first processing department according to the company's cost system is closest to: 1- Total cost to account for using weighted average units 2- Equivalent unit of production 3- Cost of units completed and transferred out 4- Cost per equivalent. Please show your calculation to the above items.