On February 1 2019 Cibula's Accounting Services Had a Cash

On February 1 2019 Cibula's Accounting Services had a cash balance of $10,000, and completed the following transactions during February 2019:
1) Purchased office supplies on account, $600.
2) Completed work for a client on credit, $1,000.
3) Paid cash for the office supplies purchased in (1) .
4) Completed work for a client and received $1,600 cash.
5) Received $1,000 cash for the work described in (2) .
6) Received $2,000 from a client for accounting services to be performed in March.
What was the balance of the company's cash account after these transactions?

A) $ 4,000
B) $ 5,000
C) $14,000
D) $ 3,400