Answer and Explanation:
The Journal entry is shown below:-
Cash Dr, $3,000
Cost of goods sold Dr, $1,500
Estimated inventory returns Dr, 600 ($3,000 × 20%)
To Inventory $1,500
To Refund liability $600
To Sales revenue $3,000
(Being cost of goods sold is recorded)
Here the sale and the cost of goods sold is recorded in which some accounts are debited and some are credited