The contribution format income statement for Huerra Company for last year is given below: Total Unit Sales Variable expenses Contribution margin Fixed expenses Net operating income Income taxes @ 40% Net income $ 998,000 49.90 29.94 19.96 16.16 3.80 1.52 $ 45,600 $2.28 598,800 399,200 323,200 76,000 30,400 The company had average operating assets of $502,000 during the year 1. Compute the company's return on investment (ROI) for the period using the ROI formula stated in terms of margin and turnover For each of the following questions, indicate whether the margin and turnover wl increase, decrease, or remain unchanged as a result of the events described, and then compute the new ROl figure. Consider each question separately, starting in each case from the data used to compute the original ROl in (1) above 5. Sales are increased by 20%; operating assets remain unchanged 6. At the beginning of the year, obsolete inventory carried on the books at a cost of $18,000 is scrapped and written off as a loss 7. At the beginning of the year, the company uses $180,000 of cash (received on accounts receivable) to repurchase and retire some of its common stock