Please show step by step working so i may be able to understand the concept for an exam. Thank you very much. your appreciation is greatly appreciated.

Auto Parts is a division of MPI International, located in Wadena, Saskatchewan. Auto Parts manufactures various automobile parts, such as bumpers, fenders, and axles, and sells them to major auto manufacturers. The division and its management are evaluated by senior corporate management on the basis of investment centre concepts. The following information pertains to operations of the Auto Parts division for 2014 $19,850,000 Total revenues Direct variable costs 8,172,000 7,150,000 Direct fixed costs 3,752,000 Allocated corporate costs Book Values Market Values December 31, December 31, December 31 December 31, 2013 2013 2014 2014 Current assets 1,188,000 1,707,000 9,737,000 11,096,000 Fixed assets Accumulated depreciation (1,188,000) (1,661,000) Total operating assets 9,737,000 $11,142,000 $9,051,000 $10,004,000 2,849,000 3,313,000 Liabilities Required 1. Compute the margin, turnover and ROI using operating income and the book value of average total operating assets. (Round "Margin" answer to the nearest whole number and other answers to 2 decimal places.)