Headlands Industries uses a periodic Inventory system. Its records show the following for the month of May, in which 77 units were sold Units Date May 1 15 24 Explanation Inventory Purchase Purchase Total 31 23 37 91 Unit Cost $10 11 12 Total Cost $310 253 444 $1,007 (a) Your Answer Correct Answer Your answer is correct Calculate the weighted average unit cost. (Round answer to 3 decimal places, ex 5125) $ Weighted average unit cost 11.066 (b) Calculate the ending inventory at May 31 using the FIFO, LIFO and average-cost methods. (Round answers to O decimal places cs. 125) FIFO LIFO AVERAGE-COST The ending inventory at May $ $ 31