Montoure Company uses a periodic inventory system. It entered into the following calendar-year 2013 purchases and sales transactions Date Activities Units Acquired at Cost Units Sold at Retail Feb. 10 Purchase Mar. 13 Purchase Jan. 1 Beginning inventory 720 units 460 units 260 units $50.00 per unit $47.00 per unit $32.00 per unit Mar. 15 Sales 860 units@ $80.00 per unit Aug. 21 Purchase Sept. 5 Purchase 220 units 620 units $55.00 per unit $51.00 per unit Sept. 10 Sales 920 units@ $80.00 per unit Totals 2,280 units 1,780 units