Answer and Explanation:
The correct income statement for July 2017 is shown below:-
Cullumber Company
Income Statement
For the month of July
Particulars                        Amount
Service Revenue                    $7,830
($7,100 + $730)
Expenses
Salaries and Wages Expense   $6,930
($2,930 + $400)
Supplies Expense              $580
($920 - $340)
Utilities Expense                $760
Insurance Expense              $490
Depreciation Expense           $240
Total expense                        $9,000
Net loss                             $1,170