Can you show me the formula used in each question, and how you came up with the answer, I need to know if I am using the correct formulas and plugging the right numbers into the equations, and the answer to compare if I come up with the same answers

Sales $36,750,000

Cost of goods

Variable $13,300,000

Fixed $9,300,000

Gross Margin $14,150,000

Selling & Administrative

Commissions $4,410,000

Fixed Marketing Expenses $1,350,000

Fixed Administrative $6,000,000

Net Operating Income $2,390,000

MODEL A MODEL B MODEL C

Normal Annual Sales Volume 16,000 19,000 1,000

Unit Selling Price $650 $750 $1100

Variable Expense per unit $250 $200 $500

Each of the following questions is independent of the others)

1. What is the over-all break-even point in sales dollars?
2. Assume that sales revenue remains constant, what is the impact on break-even and the margin of safety if there is an increases sales commission to 15%?
3. If new equipment purchased for $1,200,000, will increase fixed costs by 10% but will decrease the variable cost per unit for all 3 models by 5%. What will the new break-even point be?
4. If invests an additional $650,000 in fixed marketing expenses, sales of the Model C are expected to increase by 8%. What is the break-even and margin of safety under these circumstances?
5. If the projection is that sales will increase by 10% in the coming year, can the company afford to also increase commission from 12% to 15%? Why or why not.
6. Assume that sales volume remains fixed but there is a 5% increase in variable expenses (materials cost) for the Model A and C, and a 10% increase in variable expenses for Model B. What is the new break-even?