Answer:
Cobras Incorporated
Trial Balance as at March 31.
                       Debit      Credit
Supplies                 $1,100
Buildings               $41,000
Cash                    $2,100
Accounts Receivable      $2,800
Prepaid Insurance          $1,100
Salaries Payable                     $300
Accounts Payable                   $1,500
Common Stock                    $21,000
Retained Earnings                  $14,500
Service Revenue                   $18,100
Utilities Expense         $2,300
Salaries Expense         $5,000
Totals                 $55,000   $55,000
Explanation:
A Trial Balance is used to check mathematical accuracy in ledger Accounts. It represents a list of Balances : Debit and Credit extracted from the Ledger Accounts.