i need all the requirements

1. Remex Corporation provides you the following information for the year 2019: Total [S] Per Unit [S] Sales [4,000 Units] 140,000 35 Variable costs 80.000 2 0 Contribution margin 60,000 Fixed costs 30.000 Net operating income or Net Income 30,000 15 Required: a. Compute the break-even sales in units and in dollars [2+2 = 4 Marks] b. Calculate the margin of safety in dollars [1 Marks] c. Construct a revised contribution format income statement Prepare one income statement, considering all the changes together] if selling price per unit increases by 10%, Units of sales increase by 20% and variable cost per unit decreases by S4. [1+1+1+2 = 5 Marks] d. Refer to the original statement given in the question, calculate the degree of operating leverage ( 2 Marks]