The units of an item available for sale during the year were as follows: Jan. 1 Inventory 30 units at $460 $13,800 Aug. 13 Purchase 330 units at $437 144,210 Nov. 30 Purchase 50 units at $456 22,800 Available for sale 410 units $180,810 There are 73 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the inventory cost using (a) the first-in, first-out (FIFO) method; (b) the last-in, first-out (LIFO) method; and (c) the weighted average cost method