At the beginning of the recent period, there were 1,260 units of product in a department, 35% completed. These units were finished and an additional 6,200 units were started and completed during the period. 1,280 units were still in process at the end of the period, 25% completed. Using the weighted average method, the equivalent units produced by the department were:

1.6940 units

2. 8740 units

3. 7780 units

4. 6200 units