At the end of January of the current year, the records of Donner Company showed the following for a particular item that sold at $15.80 per unit: Transactions Units Amount Inventory, January 1 680 $ 3,400 Purchase, January 12 650 4,550 Purchase, January 26 210 1,890 Sale (540) Sale (200) Required: 1a. Assuming the use of a periodic inventory system, compute Cost of Goods Sold under each method of inventory: average cost, FIFO, LIFO, and specific identification. For specific identification, assume that the first sale was selected from the beginning inventory and the second sale was selected from the January 12 purchase. 1b. Assuming the use of a periodic inventory system, prepare a partial income statement under each method of inventory: (a) average cost, (b) FIFO, (c) LIFO, and (d) specific identification. For specific identification, assume that the first sale was selected from the beginning inventory and the second sale was selected from the January 12 purchase.