Periodic Inventory Using FIFO, LIFO, and Weighted Average Cost Methods

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

whole dollar$).$

a$.$ First$-$in$,$ first$-$out $($FIFO$)$

b$.$ Last$-$in$,$ first$-$out $($LIFO$)$

c$.$ Weighted average cost