The following transactions for the month of March have been journalized and posted to the proper accounts. 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 $4,000 cash and executing a note payable for $9,000 Mar. 4 Purchased office supplies for $730 cash. Mar. 5 Billed a client for $9,000 of design services completed. Mar. 6 Received $7,800 on account for the services previously recorded. What is the balance in Cash on March 6?