Answer:
A. $60,000
Explanation
Calculation for what the estimated cost of the ending inventory under the gross profit method would be
First step is to calculate the Gross profit
Gross profit= $300,000 *30%
Gross profit= $90,000
Second Step is to calculate the cost of goods sold
Cost of goods sold=$300,000-$90,000
Cost of goods sold= $210,000
Last step is to calculate the estimated cost of the ending inventory under the gross profit method
Using this formula
Estimated cost of the ending inventory=
Cost of goods available for sale- Cost of goods sold
Let plug in the formula
Estimated cost of the ending inventory=$270,000-$210,000
Estimated cost of the ending inventory=$60,000
Therefore the estimated cost of the ending inventory under the gross profit method would be $60,000