10) Assume the following facts for two products, Zip and Zap: Sales mix Selling price per unit Variable costs per unit Zip Zap 3 units 1 unit $21.60 $28.80 $14.40 $16.80 If total fixed costs are $53,760, the break-even point in units would be A) 1,200 units of Zip and 400 units of Zap C) 1,600 units of Zip and 4,800 units of Zap B) 4,800 units of Zip and 1,600 units of Zap D) 8,400 units of Zip and 2,800 units of Zap