How many calories should we have per day?

I am almost 5 months out. I havent been counting calories..just been trying to make sure I get in all of my protein.  How many calories, fat grams, and carbs are should we have everday?

These are the rules I follow: 

No more than 20 grams of Fat per day

Must eat at least 60 grams of Protein a day

No more than 100 grams Carbohydrate per day

No more than 15 grams of Sugar per meal (Sugar is a Carbohydrate)

Drink 48-64 ounces fluids a day

Stop drinking Water 30 minutes before a meal

Begin drinking Water 30 minutes after a meal

Eat 3 meals a day (no further than 4-6 hours apart)

3-6 Months After Surgery: eat 600-700 calories a day

6-9 Months After Surgery: eat 800-900 calories a day

9-12 Months After Surgery: eat 1000 calories a day

12-18 Months After Surgery: eat 1200 calories a day

18 Months-On After Surgery: eat Maintenance calories (BMR & Activity Level)

P.S. Malabsorption of calories lasts 18-24 months approximately. 

Thanks for asking this question...I've been wondering myself.  I'm almost 5 months out as well (1/3/11 - surgery) and I started tracking my calories on myfitnesspal.com the past few weeks and I was surprised by how many calories I eat in a day.  I'm usually right around 1200 calories...and I thought that was TOO MUCH!  I can't imagine only eating 600-800 calories though...I guess I need to re-evaluate my food choices.  My Pure Protein Bar is 200 calories by itself and then another 150 if I have a protein shake with milk.  I feel hungry a lot so I eat every few hours.  It's no wonder my weight loss has been so slow the past 2 months. 

I hope some people can put examples of their daily food intake so I can get some pointers... 

 *Look at my profile to see my eating plan (I am a vegetarian but this will give you an idea).