Sherman Electric uses a periodic inventory system. The beginning inventory of a particular product, and the purchases during the current year, were as follows: Jan. 1 Beginning inventory.. Mar. 8 Purchase.. Aug. 11 Purchase. Oct. 23 Purchase. 60 units @ $105 = $6,300 30 units @ $115= 3,450 90 units @ $125 = 11,250. 20 units @ $135= 2.700 200 units $23,700 Total available for sale. At December 31, the ending inventory of this product consisted of 65 units. Using periodic costing procedures, determine (1) cost of the year-end inventory and, (2) cost of goods sold relating to this product under each of the following flow assumptions: a. Average cost b. First-in, first-out (FIFO) c. Last-in, first-out (LIFO) (1) Inventory at Dec. 31 (2) Cost of Goods Sold $ $ $ $ $