Problem $8-40($Algo$)($LO $8-6)$

Volata Company began operations on January $1,2019.$ In the second quarter of $2020,$ it adopted the FIFO method of inventory valuation. In the past, it used the LIFO method. The company's interim income statements as originally reported under the LIFO method follow:

$\backslash$table$[[,2019,2020],[,1$stQ$,2$ndQ$,3rdQ,4$tho,$1$sto$],[$Sales$,$$$21,000,$$$23,000,$$$25,000,$$$27,000,$$$29,000$