OMG you two are hilarious!
 
Twalla-just measure out your cereal into a bowl-typically a cereal bowl holds more than the "Recommended serving" on the box. If you eat 1.5 or 2 servings at a time, you have to count the calories for BOTH-no cheating 

. Then measure the milk from the carton/jug, and then you'll know the actual calories. I wouldn't use the box as a guide-your serving size could be smaller or larger, plus you don't know exactly how much milk you put into the bowl-and the box could say 2% milk, but you may be using 1% or skim which would make the calories less.