Headlands Industries uses a periodic inventory system. Its records show the following for the month of May, in which 77 units were sold. Date Explanation Units Unit Cost Total Cost May 1 Inventory 1 34 $10 $340 15 Purchase 26 11 286 24 Purchase 40 12 480 Total 100 $1,106 Your answer is correct. Calculate the weighted-average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Weighted average unit cost $ 11.060 e Textbook and Media (b) Calculate the ending inventory at May 31 using the FIFO, LIFO and average-cost methods. (Round answers to 0 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST The ending inventory at May 31 $