Answer and Explanation:
According to the scenario,journal entry of the given data are as follow:-
Journal Entry
30 Sept Cash A/c Dr. $21,800
To Sales A/c $20,000
To Sales tax payable A/c $1,800 (20,000 × 9%)
( Being cash sales is recorded)
30 Sept Cost of goods sold A/c Dr. $12,000
To Inventory A/c $12,000
( Being September 30th sale cost is recorded)
15 Oct Sales tax payable A/c Dr. $1,800
To Cash A/c $1,800
( Being payment of tax is recorded)