Answer:
cash 18,000
     common stock    18,000
to record issuance of stock for cash
car   19,500
   cash             2,500
  note payable  17,000 ( 19,500 - 2,500)
to record purchase of automobile
rent expense 3,150
     cash                       3,150
to record payment of rent
supplies        1,450
        cash                  1,450
to record payment of supplies
office equipment   6,500
         account payable           6,500
to record purchase of equipment
prepaid insurance    2,400
                   cash                       2,400
to record purchase of insurance for the whole year
cash          12,000
service reveue       12,000
to record service earned and collected
account payable   1,800
         cash                          1,800
to record payment of account
miscellaneous expense 375
          cash                                 375
to record miscellaneous expense
blueprint expense   2,500
           blueprint payable       2,500
to record invouce for blueprint
account receivable 15,650
         service revenue            16,650
to record earned services but not collected.
salaries expense 2,800
         cash                           2,800
to record payment of assistant salary
miscellaneous expense 200
          cash                                 200
to record miscellaneous expense
note payable 300
        cash                   300
to record installment of note for car
car maintenance expense 550
           cash                                    550
to record several expense associate with the car
Explanation:
We will post each entry according to the accounting principles:
debit = credit
and to reflect the reality