What is the Journal Entry for “The Company purchased $6,000 worth of merchandise on credit”?

Journal Entry for Dr Merchandise and Cr Accounts Payable

C if the company is using perpetual system.  But if the company is using the periodic inventory system, then debit to Purchases account.

Company is buying merchandise/goods on credit so journal entry will be:

Dr Merchandise/good and Cr Accounts Payable

C-------------------------------------------------------------------------

3. Dr merchandise a/c (purchase a/c and CR Trade  payable  a/c

Dr Merchandise and Cr Accounts Payable