below: Return on investment Net operating income Turnover Margin Sales Year 1 12 ? ? ? $ 4,800,000 Year 2 36% $ 384,000 3 ? ? Del Luna Division's margin in Year 2 was 150% of the margin in Year 1. The net operating income for Year 1 was: $240,000 $256,000 $384.000 a. b c. d. $768,000 below: Return on investment Net operating income Turnover Margin Sales Year 1 12 ? ? ? $ 4,800,000 Year 2 36% $ 384,000 3 ? ? Del Luna Division's margin in Year 2 was 150% of the margin in Year 1. The net operating income for Year 1 was: $240,000 $256,000 $384.000 a. b c. d. $768,000