SP Cafe sells coffee and breakfast. Its related products include coffee, sandwich and cake. The sale proportion between coffee and sandwich is 5:2 while those for between coffee and cake is 15: 3. The following are details of these three products. Cost of coffee Cost of sandwich Cost of cake Advertising cost Rent Packaging for coffee Packaging for sandwich 60$ per unit 25$ per unit 40$ per unit 520,000$ per month. 244,400$ per month. 10$ per unit 5$ per unit Packaging for cake 4$ per unit When coffee, sandwich and cake prices are 150$ per unit, 70$ per unit and 90$ per unit, respectively. what is the break-even point of each product for a quarter?