
Answer:
The Journal entries are as follows:
(i) On September 30,
Cash A/c ($6,000 + $300) Â Dr. $6,300
To Sales                           $6,000
To sales tax payable                 $300
(To record sales and 5% sales tax payable)
(ii) On September 30,
Cost of goods sold A/c   Dr.  $3,900
To merchandise inventory           $3,900
(To transfer the cost to the finishing department)
(iii) On 15th October,
Sales tax payable A/c  Dr. $300
To cash                      $300
(To record remittance of sales tax to the state government)