The units of an item available for sale during the year were as follows:

There are 90 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 average cost method.

Jan. Inventory 9 units at $360 Feb. 17 Purchase 18 units at $414 July 21 Purchase 21 units at S468 Nov. 23 Purchase 12 units at 5495