Question 1 4 pts Rhein Manufacturing recorded operating data for its auto accessories division for the year. Sales $750,000 Contribution margin 150,000 Total direct fixed costs 90,000 Average total operating assets 400,000 How much is ROI for the year if management is able to identify a way to improve the contribution margin by $30,000, assuming fixed costs are held constant? 22.5% 12.0% 45.0% O 15.0% Question 2 4 pts A static budget is usually appropriate in evaluating a manager's effectiveness in controlling fixed manufacturing costs and fixed selling and administrative expenses. variable manufacturing costs and fixed selling and administrative expenses. fixed manufacturing costs and variable selling and administrative expenses. variable manufacturing costs and variable selling and administrative expenses