im not sure what im doing wrong

The Rolling Department of Jabari Steel Company had 3,222 tons in beginning work in process inventory ( 20% complete) on October 1. During October, 35,800 tons were completed. The ending work in process inventory on October 31 was 2,506 tons (10% complete). What are the total equivalent units for conversion costs? Round to the nearest whole unit. x units Feodback T Chock My Work Are you determining the equivalent units of materials added or of conversion of materials? When would materials typically be added in the process? When would conversion of these materials take place? Recall the definition of work in process