The Portland Division's operating data for the past two years is as follows: Year 1 Year 2 6% 5% ?$309,000 Return on investment Net operating income Turnover Margin Sales 2 $1,870,000 The Portland Division's margin in Year 2 was 150% of the margin for Year 1. The average operating assets for Year 2 were O $4,700,000 O $4,350,0o0 O $5.150,0o0 O$4,750.00o