Answer:
October 5 entries
Debit Accounts receivable $6,650
Credit Sales Revenue $6,650
To record sales
Debit Cost of goods sold $3,010
Credit Inventory $3,010
To record the cost of sales
October 8 entries
Debit Sales return $840
Credit Accounts receivable $840
To record sales reversal due to sales return
Debit Inventory $430
Credit Cost of goods sold $430
Explanation:
The perpetual inventory system is the one that ensures that the book balance for inventory is adjusted for every purchase, sale or return of inventory.
When inventory is sold on account, the entries required are debit accounts receivable and credit revenue then Debit cost of goods sold and credit inventory.