Rainbow Products uses the weighted-average method in its process costing system. The following data concern the operations of the companys first processing department for a recent month.
Work in process, beginning:
Units in process	800
Percent complete with respect to materials	70%
Percent complete with respect to conversion	10%
Costs in the beginning inventory:
Materials cost	$1,736
Conversion cost	$2,288
Units started into production during the month	18,000
Units completed and transferred out	18,200
Costs added to production during the month:
Materials cost	$59,908
Conversion cost	$520,696
Work in process, ending:
Units in process	600
Percent complete with respect to materials	70%
Percent complete with respect to conversion	20%