Periodic inventory by three methods OBJ. 2, 4 The units of an item available for sale during the year were as follows:

Jan. 1 Inventory 200 units at $60 Feb. 17 Purchase 275 units at $64 July 21 Purchase 300 units at $68 Nov. 23 Purchase 225 units at $70 There are 220 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the inventory cost by

(a) the first-in, first-out method,

(b) the last-in, first-out method, and

(c) the weighted average cost method.