periodic fifo Date Activities Units Acquired at Cost Units Sold at Retail January 1 Beginning inventory 200 units @ $10 = $ 2,000 January 10 Sales 150 units @ $40 March 14 Purchase 350 units @ $15 = 5,250 March 15 Sales 300 units @ $40 July 30 Purchase 450 units @ $20 = 9,000 October 5 Sales 430 units @ $40 October 26 Purchase 100 units @ $25 = 2,500 Totals 1,100 units $ 18,750