Rover Company produces two products: Start and End. Start has a contribution margin of $8 per unit, and End has a contribution margin of $10 per unit. Currently, for every two units of Start that Rover Company sells, it sells three units of End. The Rover Company fixed costs are $9.2 million per year. If Rover Company wants to keep the current sales mix, how many units of Start and End must it sell to break even?