please Can you explain me this T account

Post the following transactions to the Cash T-account and calculate the ending balance. The beginning balance in the Cash T-account is $5,000. 1. Receive cash from customers, $15,000. 2. Pay cash for employee salaries, $9,000. 3. Pay cash for rent, $3,000. 4. Receive cash from sale of equipment, $8,000. 5. Pay cash for utilities, $1,000. 6. Receive cash from a bank loan, $4,000. 7. Pay cash for advertising, $7,000. 8. Purchase supplies on account, $3,000. Transaction (3) is opt post to becaus Cash 5,000 15,000 9,000 (2) 9,000 8,000 3,000 (3) (6) 4,000 1,000 (s) 7,000 (7) 12,000 () Page 90 a purchase on account does not (2) Involve cash