On February 1 2019, Zultner's Accounting Services Had a Cash

Multiple Choice

On February 1 2019, Zultner's Accounting Services had a cash balance of $30,000, and completed the following transactions during February 2019:
1) Purchased office supplies on account, $1,800.
2) Completed work for a client on credit, $3,000.
3) Paid cash for the office supplies purchased in (1) .
4) Completed work for a client and received $4,800 cash.
5) Received $3,000 cash for the work described in (2) .
6) Received $6,000 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) $10,200
B) $12,000
C) $15,000
D) $42,000