Answer:
net operating income earned by product N28X is $ 69,000.
Step-by-step explanation:
Only the avoidable costs will be accounted for in determining net income earned by N28X for its decision.
Sales $ 660,000
Less Variable expense ($ 285,000 )
Contribution $ 375,000
Fixed manufacturing expenses ($195,500 )
Fixed selling and administrative expense ($110,500)
Net Income / (loss) $ 69,000
Therefore, net operating income earned by product N28X is $ 69,000.