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 $7$ units at $$38.$ $$266$

aug $13$ purchase $17$ units at $$39$ $$663$

nov $30$ purchase $9$ units at $$40$ $$360$

available for sale $33$ units $$1289$

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 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$,$ fist out $($LIFO$)$ $$\_$

c$.$ weighted average cost $$\_$