On June 30, Bonita Chemicals Limited has 17,400 units in its ending work-in-process account. These units are 80% complete with respect to conversion costs. Conversion costs are added uniformly throughout the process, but the production process adds materials in stages as follows: Process Stage Percent of Materials Added 0% completion 10% 40% completion 30% 75% completion 45% 95% completion 15% The company introduced 54,200 units to production during June and completed 50,300 units in the month. On June 1, the work in process was 70% complete with respect to conversion costs.