Answer:
Debit Raw Materials Inventory  with $72,000; Credit Direct materials Cost Variance  with 28,200, and Credit Accounts Payable  with $43,800.
Explanation:
Direct materials purchase on account =  $43,800
Standard cost of direct materials = 12,000 * $6 = $72,000
Direct materials cost variance = $72,000 - $43,800 = $28,200
The journal entries will therefore be as follows:
<u>Details                                                Dr ($)                 Cr ($)        </u>
Raw Materials Inventory                   72,000
Direct materials Cost Variance                                   28,200
Accounts Payable                                                        43,800
<em><u>To record direct materials cost and variance.                                </u></em>