Rio Coffee Shoppe sells two coffee drinksa regular coffee and a latte. The two drinks have the following prices and cost characteristics: Regular Coffee Latte Sales price (per cup) $ 1.50 $ 2.50 Variable costs (per cup) 0.70 1.30 The monthly fixed costs at Rio are $6,720. Based on experience, the manager at Rio knows that the store sells 60 percent regular coffee and 40 percent lattes. Required: How many cups of regular coffee and lattes must Rio sell every month to break even