Answer and Explanation:
The computation of the operating income in the case when the transfer price is $9 per cord
Particular             Cutting           Assembly
Revenue            $540,000           $2,500,000
            (60,000 × $9)
Cost of service
Incurred            $660,000           $360,000
                                   (60,000 × $6)
Transfered in          $0                $540,000
Total              $660,000            $900,000
Operating income    -$120,000           $1,600,000