Computing and Disclosing a LIFO Liquidation

Southeast Inc. has maintained a periodic inventory system and the LIFO inventory method for over $20$ years. The earliest layers of LIFO inventory of $42,000$ units date back $15$ years. The company had beginning inventory $($January $1)$ made up of the following three layers.

$\backslash$table$[[$Units$,$Unit Cost,Total Cost$],[42,000,$$$20\mathrm{.}00,$$$840,000$