a manufacturing firm reported the following sales and operating data for its 3 segments: sales average operating assets net operating income minimum required rate of return segment 1 segment 2 segment 3 $10,000,000 $12,000,000 $25,000,000 $4,000,000 $4,000,000 $5,000,000 $600,000 $400,000 $800,000 13% 12% 16% required: 1. compute the return on investment (roi) using the formula in terms of margin and turnover