Zippy Quadcopters plans to sell a standard quadcopter ​(toy drone) for $ 50 and a deluxe quadcopter for $ 80. Zippy purchases the standard quadcopter for $ 30 and the deluxe quadcopter for $ 50. Management expects to sell two deluxe quadcopters for every three standard quadcopters. The​ company's monthly fixed expenses are $ 26 comma 400. How many of each type of quadcopter must Zippy sell monthly to​ breakeven? To earn $ 15 comma 600​?