Dr. Cravati, DMD., opened a dental clinic on August 1, 2011. The business transactions for August are shown below: Aug. 1 Dr. Cravati invested $280,000 cash in the business in exchange for 1,000 shares of capital stock.
Aug. 4 Land and a building were purchased for $400,000. Of this amount, $60,000 applied to the land and $340,000 to the building. A cash payment of $80,000 was made at the time of the purchase, and a note payable was issued for the remaining balance.
Aug. 9 Medical instruments were purchased for $75,000 cash.
Aug. 16 Office fixtures and equipment were purchased for $25,000. Dr. Cravati paid $10,000 at the time of purchase and agreed to pay the entire remaining balance in 15 days.
Aug. 21 Office supplies expected to last several months were purchased for $4,200 cash.
Aug. 24 Dr. Cravati billed patients $13,000 for services rendered. Of this amount, $1,000 was received in cash, and $12,000 was billed on account (due in 30 days).
Aug. 27 A $450 invoice was received for several newspaper advertisements placed in August. The entire amount is due on September 8.
Aug. 28 Received a $500 payment on the $12,000 account receivable recorded August 24.
Aug. 31 Paid employees $2,200 for salaries earned in August.

A partial list of account titles used by Dr. Cravati includes:
Cash Office Fixtures and Equipment
Accounts Receivable Land
Office Supplies Building
Notes Payable Service
Revenue Accounts Payable
Advertising Expense Capital Stock
Salary Expense Medical Instruments

a. Prepare journal entries (including explanations) for each transaction. (8 marks)
b. Post each transaction to the appropriate ledger accounts (04 marks)
c. Prepare a trial balance dated August 31, 2011. (3 marks)