Crockett, Inc., sells a single product. The company's most recent income statement is given below. Sales $100,000 Less variable expenses (60,000) Contribution margin 40,000 Less fixed expenses (12,500) Net income $27,500

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 $60,000, net income will increase by $ ________