The following transactions have been journalized and posted to the proper accounts. March is the first month of business operations. Mar. 1 The business received $10,000 cash and issued common stock to stockholders. Mar. 2 Paid the first month's rent of $600. Mar. 3 Purchased equipment by paying $2,000 cash and executing a note payable for $3,000. Mar. 4 Purchased office supplies for $750 cash. Mar. 5 Billed a client for $11,000 of design services completed. Mar. 6 Received $8,000 on account for the services previously recorded. What is the ending balance in the Service Revenue account? OA. $11,000 OB. $10,000 0000 C. $8,000 D. $18,000