Answer:
$60000
Step-by-step explanation:
Given: Sales = $300000.
Cost of goods available for sale= $270000.
The gross profit ratio= 30%
First finding the gross profit out of total sales.
Gross profit=
![30\% * 300000](https://img.qammunity.org/2021/formulas/business/college/viion3oktr2rj11ds3zk43dxo7upbbb211.png)
Gross profit=
![\$ 90000](https://img.qammunity.org/2021/formulas/business/college/ileyqhiwu456tdxuxdbevnkekcd9g8dorz.png)
∴ Cost of goods sold=
![Total\ sales - gross\ profit](https://img.qammunity.org/2021/formulas/business/college/x48slpehfn5ws6o6tfnct759ekzjxyzgo8.png)
Cost of goods sold=
![300000-90000](https://img.qammunity.org/2021/formulas/business/college/8zu4cc7vz2ymvjidgxlcuocxbdb73agnt1.png)
Cost of goods sold=
![\$ 210000](https://img.qammunity.org/2021/formulas/business/college/a84e39srqr6zs73vcym852cv1g2iqau9bl.png)
Hence, cost of goods sold=
![\$ 210000](https://img.qammunity.org/2021/formulas/business/college/a84e39srqr6zs73vcym852cv1g2iqau9bl.png)
Now, finding estimated cost of the ending inventory.
Cost of ending inventory=
![cost\ of\ goods\ available\ for\ sale - cost\ of\ goods\ sold](https://img.qammunity.org/2021/formulas/business/college/4bzn8yl48jvoxodj9mxjzuhluqe7ox79ra.png)
⇒ Cost of ending inventory=
![\$ 270000- \$ 210000](https://img.qammunity.org/2021/formulas/business/college/5ke4v4rqxnzndfkw7xzdp1406xzjgoksvj.png)
∴ Cost of ending inventory=
![\$ 60000](https://img.qammunity.org/2021/formulas/business/college/42hsm1j6htkirhidrrcvlewzuuwn9mjcjd.png)
Hence, estimated cost of the ending inventory under the gross profit method would be $60000.