Missing records, computing inventory costs. Rom Williams recently took over as the controller of Johnson Brothers Manufacturing. Last month, the previous controller left the company with little notice and left the accounting records in disarray.Ron needs the ending inventory balances to report first quarter numbers. For the previous month (March 2011) Ron was able to piece together the following information: Directed Materials Purchased $ 240,000 Work in process inventory, 3/1/2011 $ 70,000 Direct materials inventory, 3/1/2011 $ 25,000 Finished goods inventory, 3/1/2011 $ 320,000 Conversion Costs $ 660,000 Total manufacturing cost added during the period $ 840,000 Cost of goods manufactured 4 times direct materials used Gross margin as a percentage of revenues 20% Revenues $ 1,037,500 Calculate the cost of: 2. Work in process inventory, 3/31/11