Burford Plastics manufactures plastic milk cartons. In the manufacturing process, all materials are added at the start of work-in-process and conversion costs are incurred uniformly through the manufacturing process. The following data was reported for the month of January 2019: Units in opening inventory 15,000 Units started this period 85,000 Units completed and transferred out 90,000 Cost of materials in opening inventory $19,000 Conversion costs in opening inventory $25,000 Materials costs incurred this period $62,000 Conversion costs incurred this period $465,000 Percentage completion of ending inventory 80% The cost of ending inventory is: O $75,000 $18,100 $48,100 O $98,100