Answer:
a. $30,000.
Explanation:
The computation of the ending inventory is shown below;
As we know that
Cost of goods sold = Beginning inventory + goods purchased - ending inventory
$280,000 = $70,000 + $240,000 - ending inventory
So,
ending inventory = $70,000 + $240,000 - $280,000
= $30,000
hence, the correct option is a.