The contribution format income statement for Huerra Company
     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 $ 1,002,000 400,800 76,000 $ 50.10 30.06 20.04 16.24 3.80 30,400 S 45,600 S 2.28 The company had average operating assets of $492,000 during the year.     
 
  
  Solution
Considering each question separately in comparison with original question
3.
Contribution Margin = 41.50%
Turnover = 1002000
ROI = 5.45%
4.
Contribution Margin = 40.00%
Turnover = 1002000
ROI = 4.13%
5.
Contribution Margin = 45.45%
Turnover = 1102200
ROI = 9.59%
6.
Contribution Margin = 40.00%
Turnover = 1002000
ROI = 5.75%
7. No effect on operating income
| Sales | 1002000 | |
| Variable Cost(-15000) | 586200 | |
| Contribution | 415800 | 41.50% | 
| Fixed cost | 324800 | |
| Net operating Income | 91000 | |
| Income Tax @40% | 36400 | |
| Net Income | 54600 | 5.45% | 

