MaterialsConversionCosts Total $ $ $ $ $ Prepare a production cost report for Waterways using the weighted-average method. (Round unit costs to 2 decimal places, e.g. 2.25.) Because most of the parts for its irrigation systems are standard, Waterways handles the majority of its manufacturing as a process cost system. There are multiple process departments. Three of these departments are the Molding, Cutting, and Welding it which prepares items for sale in kits or individually. - January