The Filling Department of Ivy Cosmetics Company had $1,900$ ounces in beginning work in process inventory $(30\%$ complete$).$ During the period, $30,900$ ounces were completed. The ending work in process inventory was $1,500$ ounces $(20\%$ complete$).$

What are the total equivalent units for direct materials if materials are added at the beginning of the process?

fill in the blank $1$

units