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 $13$ units at $$2,900$ $$37,700$

Aug. $7$ Purchase $15$ units at $$3,10046,500$

Dec. $11$ Purchase $14$ units at $$3,30046,200$

$42$ units $$130,400$

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; and $($c$)$ the 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$)$ $fill in the blank $1$

b$.$ Last$-$in$,$ first$-$out $($LIFO$)$ $fill in the blank $2$

c$.$ Weighted average cost $fill in the blank $3$