The Following Transactions for the Month of March Have Been $\$ 7,000$

The following transactions for the month of March have been journalized and posted to the proper accounts. Mar, 1 The business received $\$ 7,000$ cash and issued common stock to stockholders.
Mar. 2 Paid the first month's rent of $\$ 700$ .
Mar. 3 Purchased equipment by paying $3,000 cash and executing a note payable for $8,000.
Mar. 4 Iurchased office supplies for $\$ 700 \mathrm { cash }$ .
Mar. 5 Eilled a client for $\$ 10,000$ 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?

A) $11,100
B) $10,400
C) $13,400
D) $11,800