The Swivel Chair Company manufacturers a standard recliner. During February, the firm's Assembly Department started production of 147,000 chairs. During the month, the firm completed 180,000 chairs and transferred them to the Finishing Department. The firm ended the month with 21,000 chairs in ending inventory. All direct materials costs are added at the beginning of the production cycle. Conversion costs are incurred uniformly over the production cycle. How many chairs were in inventory at the beginning of the month