Beginning WIP inventory is 15,500 units, 75% complete for materials

Beginning WIP inventory is 15,500 units, 75% complete for materials. During the month, 90,000 units were started; 87,000 were finished; and ending WIP was 18,500 units that were 50% complete for materials.
1) How many equivalent units should be used to allocate costs for materials? (Assume that the weighted average method )
Question #2 During a period, 38,200 units were completed and 4,200 units were in ending WIP inventory. Ending WIP was 75% complete for direct materials and 50% complete for conversion costs.
2) What are the equivalent units for direct materials?
3) What are the equivalent units for conversion costs?