The accounting records of Kingbird Electronics show the following data.

Beginning inventory $,3,060$ units at $$7$

Purchases $,7,140$ units at $$9$

Sales

$8,590$ units at $$12$

Determine cost of goods sold during the period under a periodic inventory system using $($a$)$ the FIFO method, $($b$)$ the LIFO method, and $($c$)$ the average$-$cost method.

FIFO

LIFO

Average$-$cost

Cost of goods sold

$

$

$