Cost of Production and Journal Entries 700 pounds of alloy in process, which were 30% complete as to conversion. The Work in Process balance for these 700 pounds was $99,260, determined as follows: a1. Prepare the May journal entry for the Casting Department for the materials charged to production. If an amount box does not require an entry, leave it blank. Check My Work types of costs are considered conversion costs? b. Determine the Work in Process-Casting Department May 31 balance. c. Compute the change in the costs per equivalent unit for direct materials and conversion from the previous month (April)