A total of $3,900 in supplies was purchased during the year. At the end of the year $980 of the supplies were left. The adjusting entry needed at the end of the year is. Multiple Choice debit Supplies Expense $3,900, credit Supplies $3,900 O debit Supplies Expense $2.920, credit Supplies $2,920 O debit Supplies Expense $980; credit Supplies $980 debit Supplies $2.920. credit Supplies Expense $2.920