How units transferred

The Assembly Department started the month with 13,000 units in its beginning work in process inventory. An additional 305,000 units were transferred in from the prior department during the month to begin processing in the Assembly Department. There were 17,250 units in the ending work in process inventory of the Assembly Department. How many units were transferred to the next processing department during the month? 309,250 318,000 335,250 300,750