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

Sales$100,000

Less variable expenses(60,000)

Contribution margin40,000

Less fixed expenses(10,000)

Net income$30,000

a.Contribution margin ratio is?

b.Breakeven point in total sales dollars is?

c.To achieve $50,000 in net income, sales must total?

d.If sales increase by $100,000, net income will increase by?