Assuming a constant mix of 3 units of Small for every 1 unit of Large, a selling price of $21.60 for Small and $28.80 for Large, variable costs per unit of $14.40 for Small and $16.80 for Large, and total fixed costs of $53,760, the break-even point in units would be

1,200 units of Small and 400 units of Large.

1,600 units of Small and 4,800 units of Large.

4,800 units of Small and 1,600 units of Large.

40,320 units of Small and 13,440 units of Large.