Rally Quadcopters plans to sell a standard quadcopter (toy drone) for $60 and a deluxe quadcopter for $80 Rally purchases the standard quadcopter for $50 and the deluxe quadcopter for $55 Management expects to sell two deluxxe quadcopters for every three standard quadcopters. The company's monthly fixed expenses are $16,800. How many of each type of quadcopter must Rally sell monthly to breakeven? To eam $12,000? First identify the formula to compute the sales in units at various levels of operating income using the contribution margin approach (Abbreviations used: Aug average, and CM contribution margin.) Breakeven sales in units