A company completed the following transactions during the month of October: 1. Purchased office supplies on account, $4,000. II. Provided services for cash, $21,000. III. Provided services on account, $16,000. IV. Collected cash from a customer on account, $7,200. V. Paid the monthly rent of $14,000. What was the company's net income for the month? OA. $51,000 OB. $37,000 OC. $16,000 OD. $23,000