The following data apply to Beta Corporation for a given period:

Variable costs per unit	$3.50
Contribution margin per unit	$1.50
Breakeven sales (present volume)	$1,000,000

Beta wants to sell an additional 50,000 units at the same selling price. Variable costs per unit are not likely to change, but Beta may incur additional fixed costs. By how much can fixed costs increase before the additional 50,000 units of sales are not worthwhile?