please answer questions 2,3,4,5,6 completely . thank you

41422. Contrbution margin ratio: Sales Variable costs Units Unit Varlable Cost Contribution margin Sales Contrbution margin ratio 3. Break-even sales: Fixed costs Cost-Volume-Profit Chart Margin of safety: \begin{tabular}{l|l|l|l|l|l|l|} \hline Expected sales & & Units \\ Break-even point \\ Margin of safety (in dollars) & & & \\ \hline Expected sales & & & \\ \hline Margin of safety (as a percentage of sales) & & & \\ \hline \end{tabular} 6. Operating leverage: Contribution margin Operating income Operating leverage It is expected that 12,000 units will be sold at a price of $240 a unit. Maximum sales within the relevant range are 18,000 units