Edmonco Company produced and sold 52,500 units of a single product last year, with the following results: Sales Revenue Manufacturing costs: $1,500,000 Variable 546,000 Fixed 300,000 Selling costs: Variable 54,500 Fixed 85,000 Administrative costs: Variable 199,500 Fixed 140,000 If Edmonco's sales revenues increase 18%, what will be the percentage increase in income before income taxes?