Answer and Explanation:
The Journal entry is shown below:-
1. Accounts receivable Dr, $8,600
 To Sales $8,600
(Being sales made is recorded)
2. Cost of goods sold Dr,$5,160 
 To Merchandise inventory $5,160 
(Being cost of goods sold is recorded)
3. Sales return and allowances Dr, $2,150 
 To Accounts receivable $2,150 
(Being return of the merchandise is recorded)
4. Merchandise inventory Dr, $1,290 ($2,150 × $5,160 ÷ $8,600)
 To Cost of goods sold $1,290
(Being cost of merchandise returned is recorded)
5. Cash Dr, $6,450 ($8,600 - $2,150)
 To Accounts receivable $6,450
(Being receipt of cash iks recorded)