A retail company has a profit margin of 10% on its sales. The company's fixed costs are $50,000, and its variable costs are $30 per unit. The company has a target profit of $80,000 and expects to sell 10,000 units of its product.

Required:

1. Calculate the selling price per unit.
2. Determine the break-even point in units and in sales dollars.
3. Determine the sales revenue required to achieve the target profit.
4. Calculate the company's margin of safety in dollars.