Answer:
At the time of purchase of raw material inventory,
Raw material inventory account will debit and accounts payable account will credit.
Therefore, the Journal entry for this transaction is as follows:
Raw Materials Inventory Account   Dr. $36,000
To Accounts Payable                      $36,000
(To record the purchase of raw material on account)
Workings:
Raw material Inventory = Units of raw material purchased × Price per unit
                    = 6,000 × $6
                    = $36,000