How do I find the LIFO cost?

The periodic inventory records of Wexton Prosthetics indicate the following for the month of July: (Click the icon to view the inventory records.) At July 31, Wexton counts six units of inventory on hand. Compute ending merchandise inventory and cost of goods sold for Wexton using the LIFO inventory costing method. Ending Merchandise Inventory Cost of Goods Sold LIFO Cost Enter any number in the edit fields and then click Check Ans Jul. Data Table 1 Beginning merchandise inventory 8 Purchase 15 Purchase 26 Purchase Print Done 9 units 8 units 12 units 16 units @ $35 each @ $ 30 each @ $ 44 each @ $ 42 each X