Wow,
That sure is a lot of food. I don't think I was able to do that early out. I was told by our Nutritionist to not eat margarine. We are told to eat Butter. Also, I can't drink unsweetened juice...it gets me every time. So, basically, I think they gave you a good guideline..but as we all see every doctor guideline is different and varies slightly. Good thing to do is increase your calories as they suggested to you and do it by eating what works best for you.
At 2 year plus, I can eat 3/4 to 1 cup of food depending on whether or not it is protein mixed with veggies or mostly veggies mixed with protein. I sure can't eat a whole cup of meat...I would just die.