Double Boe has the following cost at various levels of activity: Sales in Units Total Cost September 10,000 $ 152,000 October 30,000 $ 350,000 November 12,000 $ 175,000 December 8,000 $ 130,000 Total costs consist of Cost A, Cost B, and Cost C. The breakdown of total costs when Sales are 8,000 units are as follows: December Cost A (Fixed) $ 30,000 Cost B (Variable) 16,000 Cost C (Mixed) 84,000 Total Cost $ 130,000 Selling price per unit is $14. If sales are anticipated to be 15,000 units in the next month, what will the margin of safety in units be? not enough information to calculate 0 2,000 units O 5,000 units 2,500 units