Taxes R Us (TRU), an income tax preparation firm, uses the FIFO method of process costing for its monthly reports. TRU has no materials cost in the preparation of the returns. The following shows its March information: Returns in process, March 1 (384 complete) 280 Returns started in March 2,500 Returns in process, March 31 (90% complete) 560 Labor and overhead costs for returns in process, March 1 $7,000 Labor and overhead costs incurred in March $ 369,600 Required: Calculate the following amounts for conversion costs using the FIFO method: 1 2. Number of equivalent units (tax returns) Cost per equivalent unit Cost of completed tax returns for the month Cost of tax returns in process as of March 31 3 March