The units of an item available for sale during the year were as follows: There are 20

Question:

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

The units of an item available for sale during the (FIFO)

There are 20 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;
(c) The average costmethod.