Ahmad Company purchased office supplies costing $6,000 and debited Office Supplies for the full amount. At the end of the accounting period, a physical count of office supplies revealed $2,400 still on hand. The appropriate adjusting journal entry to be made at the end of the period would be O a. Debit Office Supplies Expense, $2,400; Credit Office Supplies, $2,400. O b. Debit Office Supplies, $3,600; Credit Office Supplies Expense, $3,600. Debit Office Supplies Expense, $3,600; Credit Office Supplies, $3,600. Od. Debit Office Supplies, $2,400; Credit Office Supplies Expense, $2,400.