Gamma Company manufactures a product in two sequential departments. On 1 September, Department 2 had 2433 units, which were 50 per cent complete as to conversion cost. During September, 16362 units were completed and transferred from Department 1 to Department 2. On 30 September, Department 2 had 3502 units, which were 20 per cent complete as to conversion costs. Compute the number of units that were completed and transferred out from Department 2 during the month of September.