Hi, need help with cost according homework

Problem 4-42 Contribution Margin, Break-Even Units, Break-Even Sales, Margin of Safety, Degree of Operating Leverage

Aldovar Company produces a variety of chemicals. One division makes reagents for laboratories. The divisions projected income statement for the coming year is:

Sales (203,000 units @ $70)	$14,210,000
Total variable cost	8,120,000
Contribution margin	$ 6,090,000
Total fixed cost	4,945,500
Operating income	$ 1,144,500

Required:

• 1.Compute the contribution margin per unit, and calculate the break-even point in units (Note: Round answer to the nearest unit.) Calculate the contribution margin ratio and use it to calculate the break-even sales revenue. (Note: Round contribution margin ratio to four significant digits, and round the break-even sales revenue to the nearest dollar.)
• 2.The divisional manager has decided to increase the advertising budget by $250,000. This will increase sales revenues by $1 million. By how much will operating income increase or decrease as a result of this action?
• 3.Suppose sales revenues exceed the estimated amount on the income statement by $1,500,000. Without preparing a new income statement, by how much are profits underestimated?
• 4.Compute the margin of safety based on the original income statement.
• 5.Compute the degree of operating leverage based on the original income statement. If sales revenues are 8% greater than expected, what is the percentage increase in operating income? (Note: Round operating leverage to two decimal places.)