The asset account, Office Supplies had a beginning balance of $5,700. During the accounting period, office supplies were purchased, on account for $5,100. A physical count, on the last day of the accounting period, shows $2.900 of office supplies on hand. What is the amount of Supplies Expense for the accounting period? OA $5,100 OB. $3,500 OC. $7,900 OD. $2.800