Information about Isabelle Company for the month ending December 31, 2019, is as follows:

Sales $650,000 Cost of goods sold 452,000 Net operating income 35,000 Beginning inventories: Direct materials 50,000 Work in process 42,000 Finished goods 70,000 Ending direct materials is 20 percent smaller than beginning direct materials. Ending work in process is 10 percent more than the beginning work in process. Ending nished goods increased by $11,000 during the year. Prime costs and conversion costs are 70 percent and 60 percent of total manufacturing costs added, respectively. Assume no income taxes or indirect materials. Required: at. Prepare a statement of cost of goods manufactured for December. b. Prepare an absorption income statement for December. c. Calculate conversion costs. d. Calculate prime costs