I HAVE ANSWER BELOW I JUST NEED EXPLANATION ON HOW TO GET IT PLEASE

The Williams Corporation had the following transactions in November: 1 Services previously sold in advance of $9,000 were performed. 4 Received $3,000 from customers on account. 15 Performed $5,000 of services on account 22 Customers paid for $500 of services in advance. 28 Received utility bill for $700; will pay next month. 29 Paid $3,000 to employees for their services What is the company's net income for the month? 10,300 (with margin: 0 )