A company distributes a product, packaging for moves whose selling price is $15 per unit and whose variable expense is $12 per unit. The company's monthly fixed expenses is $4,200.

1. Calculate the company's break-even point in unit sales.

2. Calculate the company's break-even point in dollar sales.

3. If the company's fixed expenses increase by $600, what would become the new break-even point in unit sales? In dollar sales?