compute the cost assigned to ending inventory using

$($

a

$)$

$$FIFO$,$

$($

b

$)$

$$LIFO$,$

$($

c

$)$

$$weighted average, and

$($

d

$)$

$$specific identification.

$($

For specific identification, units sold consist of

$620$

$$units from beginning inventory.

$210$

$$from the February

$10$

$$purchase$,$

$120$

$$from the March

$13$

$$purchase$,$

$140$

$$from the August

$21$

$$purchase$,$ and

$390$

$$from th the September

$5$

$$purchase