Calculate weighted-average unit cost. (Round answer to 3 decimal places, es. 5.125.) Weighted-average unit cost Attempts: 1 of 2 use (a2) Compute the cost of the ending inventory and the cost of goods sold under FIFO. LIFO, and average-cost. (Round answers to 0 decimal places, es. 125.) Grouper Corp. uses a periodic inventory system and reports the following for the month of June