Federal Pty Ltd uses a weighted-average process-costing system and has one production department. All materials are introduced at the start of manufacturing; in contrast, conversion cost is incurred uniformly throughout production. The company had respective work-in-process inventories on May 1 and May 31 of 62,000 units and 70,000 units, the latter of which was 40% complete. The production supervisor noted that Federal completed 100,000 units during the month. Costs in the May 1 work-in-process inventory were subdivided as follows: materials, $40,000; conversion, $90,000. During May, Federal charged production with $300,000 of material and $710,000 of conversion, resulting in a material cost per equivalent unit of $2. Required:

A. Determine the number of units that Federal started during May. B. Compute the number of equivalent units with respect to conversion cost. C. Determine the conversion cost per equivalent unit. D. Compute the cost of the May 31 work-in-process inventory. E. What account would have been credited to record Federal's completed production?