Periodic inventory using FIFO, LIFO, and weighted average cost methods

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

There are $23$ units of the item in the physical inventory at December $31.$ The perlodic inventory

system is used. Determine the inventory cost using the $($a$)$ first$-$in$,$ first$-$out $($FFO$)$ method; $($b$)$

last$-$in$,$ first$-$out $($LIFO$)$ method; and $($c$)$ weighted average cost method $($round per$-$unit cost to

two decimal places and your final answer to the nearest whole dollar$).$

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

method

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

method

c$.$ Weighted average cost

method