Haha. $3.00 is how much one flat white costs at the local cafés. Guess I should have mentioned that I'm not downing 10 or 20 cups of instant coffee per day.
The point is that when you realize that the food budget is equivalent to $9, the only way you can make the coffee expenditure seem unrealistic is to conveniently not mention that fact and say something like "You spend 33% of your food budget just for coffee?".
Accusing someone of having a caffeine addiction for spending a mere $3 a day on it is just silly.