On April 1, 2021, Easton Company's beginning work in process inventory had 9,000 units in its only production department. Beginning WIP units were 50% complete as to conversion costs. Easton introduces direct materials at the beginning of the production process. During April, a total of 19,000 units were started and a total of 20,000 units were completed. The remaining units in Easton's ending WIP inventory was 70% complete as to conversion costs. Easton uses the weighted average method. Use this information to determine for April 2021 the equivalent units of production for conversion costs. (Round and enter to nearest whole number of units)