28. The following transactions for the month of March have been journalized and posted to the proper accounts of a sole proprietorship. Mar. 1 The business received $9,000 cash from the owner of the business, Morris Tharps. The business gave capital to Morris Tharps. Mar. 2 Paid the first month's rent of $900. Mar. 3 Purchased equipment by paying $3,000 cash and executing a note payable for $7,000. Mar. 4 Purchased office supplies for $730 cash. Mar. 5 Billed a client for $10,000 of design services completed. Mar. 6 Received $7,900 on account for the services previously recorded. What is the balance in Cash on March 6? A) $13,170 B) $12,270 C) $15,270 D) $13,900