Answer: $49,000
Explanation: Net operating income is the income that a company left with after paying for fixed and variable expenses. It is sometimes denoted as EBIT, earnings before interest and tax.
EBIT = Sales - ( fixed expense + variable expenses )
sales = 5,000 * $25 = $125,000
variable expense = 5,000 *( $10 + $2 ) = $60,000
fixed expenses = $2000 + $12000 + $2000 = $16,000
so,
EBIT = $125,000 - ( $16,000 + $60,000 )
= $49,000