Final answer:
Splish Brothers Company records a debit to Inventory and a credit to Accounts Payable for $4,700 on the purchase date. When returning defective goods, they debit Accounts Payable and credit Inventory for $720.
Step-by-step explanation:
On October 5, when Splish Brothers Company buys merchandise from Bramble Company on account, the journal entry on Splish Brothers' books, assuming a perpetual inventory system, would be to debit Inventory for $4,700 and credit Accounts Payable for $4,700, reflecting the purchase of merchandise.
On October 8, when Splish Brothers returns defective goods, they would record the return by debiting Accounts Payable for $720 and crediting Inventory for $720, which shows the reduction of obligation to Bramble Company as well as the decrease in inventory due to the return of defective goods. The fair value of the returned goods is not relevant to this entry on Splish Brothers' books as it pertains to the valuation on Bramble Company's side.