. FlipCo , which uses the periodic method and weighted average costing , begins operations in 20X8 . On January 15 , FlipCo purchases 20 units at $6 each : on March 21 , 30 units at $7.00 each , on June 1, 450 units at $5.25 each , and on November 12 , 50 units at $6.25 each . a. What is FlipCo's cost per unit ? b. If ending inventory is 125 units , what is FlipCo's 20X8 ending inventory and COGS ? 2. CommerceCo. provides you with the following information: December 31 , 20X8 Ending inventory of 600 units $ 8,800 January 28 , 20X9 Purchase of 700 units @ $23 16,100 January 28 , 20X9 Freight for purchase 500 October 5, 20X9 Purchase of 900 units @ $25 22,500 October 9, 20X9 Return of 200 units @ $25 5,000 On December 31 , 20X9 , there are 1,200 units on hand . Using the weighted average method , what is cost of goods sold on CommerceCo's 20X9 income statement ? 3. RichCo starts up in 20X9 . The company makes the following purchases Purchase Units purchased Unit cost Total cost date January 15 700 $16 $ 11,200 April 12 2,600 $17 44,200 June 3,300 $19 2,700 August 25 1,300 $22 28,600 September 5 5,100 $24 122,400 December 11 900 $27 24,300 RichCo's 20X9 year -end physical count finds 2,600 units on hand . If RichCo uses weighted -average costing , what is 20X9 goods available for sale , ending inventory , and COGS ? 4. PrimeCo started operations s in July and uses moving -average costing under the perpetual method. Transactions from July through October are: Purchases Sales July 21 2,000 @ $ 8 August 2 800 @ $10 August 21 900 @ $11 September 11 1,000 @ $9 October 11 400 @ $14 October 15 100 @ $15