Lilac Skin Care Company consists of two departments, Blending and Filling. The Filling Department received 45,000 ounces from the Blending Department. During the period, the Filling Department completed 42,800 ounces, including 4,000 ounces of work in process at the beginning of the period. The ending work in process inventory was 6,200 ounces How many ounces were started and completed during the period?