please help i dont understand!

RadCliff Inc manufactures and sells a single product. Current sales are 12,000 units per year. Data for the current year is reflected below.

Selling Price per Unit $75

Manufacturing Costs

Direct Materials $15 per unit

Direct Labor $8 per unit

Variable Overhead $4 per unit

Fixed Overhead $200,000 per year

Non-Manufacturing Costs

Variable selling and administrative $3 per unit

Fixed selling and administrative $250,000 per year

REQUIRED:

1. Compute the number of units that RadCliff must sell annually to break-even

2. Compute the dollar margin of safety

3. The company is considerable implementing the following simultaneous changes. Reduce the selling price per unit to $72.00 Increase advertising budget which will increase the fixed selling expenses by $20,000 per year. Use a new supplier of materials. Direct material costs will decrease by 20% by using the new supplier.

If these changes are implemented, the company believes that units sold will increase from 12,000 units to 15,000 units per year.

Compute the new break-even point in units

Compute the new dollar margin of safety

Compute the change in net operating income

Would you advise management to implement these changes? Why or why not?