Company prepared this income statement based on a sales volume of 1,000 units. (The relevant range of production is 800 units to 1,400 units.) Sales $80,000 Variable expenses $41,600 Contribution margin $38,400 Fixed expenses $24,000 Net operating income $14,400 What is the margin of safety in dollars? Group of answer choices $90,000 $20,000 $30,000 $40,000