Wholesale Center's operating data for the past two years are provided below. Year 1 Year 2 Return on investment 12% 36% Net operating income ? $ 360,000 Turnover ? 3 Margin ? ? Sales $ 3,200,000 ? Wholesale Center's margin in Year 2 was 150% of the margin in Year 1. The turnover for Year 1 was: 12 1.5 3.0 4.0