I need #30-33, I included the #28 as a reference below.

30. Using the data contained above in #28 regarding Stockmaster Corporation write in the value for Variable Expenses Ratio on the answer sheet. 31. Using the data contained above in #28 regarding Stockmaster Corporation write in the value for the contribution margin ratio on the answer sheet. 32. Using the data contained above in #28 regarding Stockmaster Corporation write in the value for the Fixed Expenses ratio on the answer sheet. 33. Using the data contained above in #28 regarding Stockmaster Corporation write in the value for the Net Operating Income ratio on the answer sheet. 28. Stockmaster Corporation has provided the following contribution format income statement. Assume that the following information is within the relevant range $ Sales (8,000 units) Variable expenses Contribution margin Fixed expenses Net operating income 320,000 192,000 128.000 121.600 6,400 $