Flint Corporation uses a periodic inventory system. Its records show the following for the month of May, in which 79 units were sold. Units Unit Cost Total Cost Date May 1 $306 15 Explanation Inventory Purchase Purchase Total 24 240 462 $1,008 100 Calculate the weighted average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Weighted-average unit cost LINK TO TEXT LINK TO VIDEO 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 AVERAGE-COST The ending inventory at May 31 s