Nov. 5 Purchased 850 units of product at a cost of $10 per unit. Terms of the sale are 3/10, n/60; the invoice is dated November 5. Nov. 7 Returned 30 defective units from the November 5 purchase and received full credit.
Nov. 15 Paid the amount due from the November 5 purchase, minus the return on November 7.

Required:
Prepare the journal entries to record each of the above purchases transactions of a merchandising company. Assume a perpetual inventory system.

Please see explanation column for answer

Explanation: A perpetual inventory system maintains inventory balances ensuring that records are continually made immediately when purchases or sale are made together with any returns which are recorded in inventory accounts.

To record purchase of merchandise

Date         Account                                    Debit       Credit

Nov 5    Merchandise Inventory         $8500

         Accounts payable                                               $8,500

To record return of merchandise purchased

Nov 7      Accounts payable                  $300

       Merchandise Inventory                                          $300

To record payment of inventory

Nov 15    Accounts payable                $8,200                      

              Cash                                                                  $7,954

          Merchandise Inventory                                         $246

Calculation =

Nov 5 - Cost of merchandise purchased =  No of units x unit price = 850 x 10 =$8500

Nov 7 - Cost of merchandise returned =  No of units returned x unt price = 30 x 10 = $300

discount received = Balance from accounts payable  x discount rate = (8,500- 300) x 3%= 8200 x 0.03=  $246

   Cash  =    Accounts payable    - Merchandise Inventory = $8200 - 246 =$7984.

(75years ,i believe is the correct answer.good luck