Answer:
$69,520
Explanation:
"Note: Let assume salvage value is $3,000"
       Company A
    Income Statement
    For the year 20X1
Sales              $638,000
Expenses          $510,000
Depreciation        $40,000  [(150,000-30,000)/3}
Income before tax   $88,000
Income tax at 21% Â Â Â $18,480
Net Income         $69,520