Rio Coffee Shoppe sells two coffee drinks, a regular coffee and a latte. The two drinks have the following prices and cost characteristics:

Regular Coffee Latte Sales price (per cup) $ 1.60 $ 2.60 Variable costs (per cup) 0.50 1.50 The monthly fixed costs at Rio are $7,920. Based on experience, the manager at Rio knows that the store sells 70 percent regular coffee and 30 percent lattes.

Required: How many cups of regular coffee and lattes must Rio sell every month to break even?