The Portland Division's operating data for the past two years is as follows: Year 1 Year 2 Return on investment 12 % 24 % Net operating income ? 288,000 Turnover ? 2 Margin ? ? Sales $1,600,000 ? The Portland Division's margin in Year 2 was 150% of the margin for Year 1. The average operating ass $750,000 $400,000 $1,200,000 C $800,000