Rio Coffee Shoppe sells two coffee drinks-a regular coffee and a latte. The two drinks have the following prices and cost characteristics: Sales price (per cup) Variable costs (per cup) Regular Coffee $ 1.80 8.90 Latte $ 2.70 1.60 The monthly fixed costs at Rio are $6,440. Based on experience, the manager at Rio knows that the store sells 90 percent regular coffee and 10 percent lattes. Required: How many cups of regular coffee and lattes must Rio sell every month to break even? Break-even Sales in Units Regular coffee Lattes