Blankinship, Inc., sells a single product. The company's most recent income statement is given below.

Sales $200,000

Less variable expenses (120,000)

Contribution margin 80,000

Less fixed expenses (50,000)

Net income $30,000

Required:

1. Contribution margin ratio is ________ %

2. Break-even point in total sales dollars is $ ________

3. To achieve $40,000 in operating income, sales must total $ ________

4. If sales increase by $50,000, net income will increase by $ ________