The Portland Division's operating data for the past two years is as follows: Year 1 Year 2 Return on Investment 14 Net operating income 6 456.000 Turnover Margin Sales 2,400,000 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 $7.150,000 O $6,800,000 O $7.600,000 O $7,200,000