But what about this sum? Well, this sum here could get as high as, so let me write it this way. So X plus Y, X plus Y, what's the maximum value that it could take on? Well, if you get a heavy version of each of these, then it's going to be 17 plus five, so this has to be less than 22 ounces, and it's going to be greater than or equal to, well, what's the lightest possible scenario? Well, you could get a 15-ouncer here and a three-ouncer here, and it is 18 ounces. And so notice, now the variation for the sum is larger. We have a range that this thing can take on now of four, while the range for each of these was just two.