2. A total of $900 worth of stationery was charged to the office supplies expense during the year. On 30 June, about $490 worth of stationery is still considered useful for next year. The adjusting entry at 30 June is: a. Dr Office Supplies $900 Cr Cash $900 b. Dr Office Supplies $490 Dr Office Supplies Expense $490 Cr Office Supplies Expense $490 Cr Office Supplies $490 c. d. Dr Office Supplies $410 Cr Office Supplies Expense $410 e. Dr Office Supplies Expense $410 Cr Office Supplies $410