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

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

Jan. $1$ Inventory $10$ units at $$36$ $$360$

Aug. $13$ Purchase $20$ units at $$39780$

Nov. $30$ Purchase $10$ units at $$40400$

Available for sale $40$ units $$1,540$

There are $16$ units of the item in the physical inventory at December $31.$ The periodic inventory system is used. Determine the inventory cost using the $($a$)$ first$-$in$,$ first$-$out $($FIFO$)$ 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$)=$

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

c$.$ Weighted average cost $=$