The total inventory can be calculated by adding the initial or beginning inventory which is equal to $600 and the cost of goods sold, $1,400. That is,
T = $600 + $1,400
T = $2,000
Then, we subtract the ending inventory of $800 from the calculated value.
S = $2,000 - $800
S = $1,200
Hence, the answer to this item is the first choice.