Answer:
Dr Supplies   $8,200
Cr Accounts payable    $8,200
Dr salaries expense   $920
Cr Cash                 $920
Dr accounts receivable $5,300
Cr sales revenue             $5,300
Dr accounts payable     $8,200
Cr cash                         $8,200
Explanation:
The purchase of supplies on account would be debited to supplies account and credited to accounts payable.
The payment of weekly salaries would be debited to salaries expense and credited to cash.
The amount in connection with services provided on account is a credit to sales revenue and a debit to accounts receivable.
Payment for supplies would a credit to cash and a debit to accounts payable.
Placement of an order would have no entry until the goods are received.