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Question: Compute the cost assigned to ending inventory using $($a$)$ FIFO, $($b$)$ LIFO, $($c$)$ weighted average, and $($a$)$ specific identification. $($For specific identification, units sold consist of $580$ units from beginning inventory, $320$ from the February $10$ purchase, $180$ from the March $13$ purchase, $140$ from the August $21$ purchase, and $285$ from the September $5$ purchase.$)$