I have solved it, but Im in need to double check my answers because I'm aiming for an A, thanks.

28. Stoekmaster Corporation has provided the following oontribution format income statement. Assume that the following information is within the relevant range. Sales (8,000 units) S 320,000 Variable expenses 192,000 Contribution margin 123,000 Fixed expenses 121,600 Net operating income $ 6,400 The margin of safety in dollars is closest to: A) $6,400 B) 3 16,000 C) $121,600 D) $128,000 29. Using the data contained above in #18 regarding Stockmaster Corporation write in the value percentage to use for Sales on the asset sheet. 30. Using the data contained above in #23 regarding Stockmaster Corporation write in the value for Variable Expenses Ratio on the answer sheet. 31. Using the data contained above in #28 regarding Stoekmaster 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