Ivy Cosmetics Company consists of two departments, Blending and Filling. The Filling Department received $41,600$ ounces from the Blending Department. During the period, the Filling Department completed $56,100$ ounces, including $17,400$ ounces of work in process at the beginning of the period. The ending work in process inventory was $2,900$ ounces. How many ounces were started and completed by the Filling Department during the period?